AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON MAY 3, 2002
                                            REGISTRATION STATEMENT NO. 333-84826

================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                --------------

                                 AMENDMENT NO. 1
                                       TO

                                    FORM S-3
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933
                                 --------------


                                                              
L-3 COMMUNICATIONS                                          L-3 COMMUNICATIONS
  HOLDINGS, INC.                                                CORPORATION

           (Exact Name of Registrants as Specified in Their Charters)




                                                              
    DELAWARE                                                        DELAWARE
         (State or Other Jurisdiction of Incorporation or Organization)




                                                              
13-3937434                                                         13-3937436
                     (I.R.S. Employer Identification Number)




                                                    
     600 THIRD AVENUE                                       600 THIRD AVENUE
 NEW YORK, NEW YORK 10016                              NEW YORK, NEW YORK 10016
      (212) 697-1111                                        (212) 697-1111
               (Address, Including Zip Code, and Telephone Number,
        Including Area Code, of Registrants' Principal Executive Offices)


                                 --------------
                       SEE TABLE OF ADDITIONAL REGISTRANTS
                                 --------------
                          CHRISTOPHER C. CAMBRIA, ESQ.
                                600 THIRD AVENUE
                               NEW YORK, NY 10016
                                 (212) 697-1111
            (Name, Address, Including Zip Code, and Telephone Number,
                   Including Area Code, of Agent For Service)
                                 --------------
                                    Copy to:
                              VINCENT PAGANO, ESQ.
                           SIMPSON THACHER & BARTLETT
                              425 LEXINGTON AVENUE
                          NEW YORK, NEW YORK 10017-3954
                                 (212) 455-2000
                                 --------------
   APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: From time
to time after the Registration Statement becomes effective as determined by
market conditions and other factors.
                                 --------------
     If the only securities being registered on this Form are being offered
pursuant to dividend or interest reinvestment plans, please check the following
box. [ ]

     If any of the securities being registered on this Form are to be offered
on a delayed or continuous basis pursuant to Rule 415 under the Securities Act
of 1933, other than securities offered only in connection with dividend or
nterest reinvestment plans, check the following box. [X]

     If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list the Securities Act registration statement number of the earlier
effective registration statement for the same offering. [ ]
                                 --------------
     If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [ ]

                                --------------
If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [ ]
                                --------------

                                                   (Continued on following page)
================================================================================


(Continued from previous page)

                         CALCULATION OF REGISTRATION FEE
- --------------------------------------------------------------------------------




                                                                              PROPOSED MAXIMUM          PROPOSED         AMOUNT OF
                 TITLE OF EACH CLASS OF                      AMOUNT TO BE    AGGREGATE OFFERING     MAXIMUM AGGREGATE  REGISTRATION
               SECURITIES TO BE REGISTERED                   REGISTERED(1)  PRICE PER SECURITY(1)   OFFERING PRICE(1)       FEE
                                                                                                              
Debt Securities of L-3 Communications Holdings, Inc. and
 L-3 Communications Corporation and Preferred Stock,
 Common Stock, Stock Purchase Contracts, Stock
 Purchase Units and Warrants of L-3 Communications
 Holdings, Inc.(2) ....................................   $1,000,000,000               100%(3)     $ 1,000,000,000(3) $  92,000.00*
- ------------------------------------------------------------------------------------------------------------------------------------
Guarantees of L-3 Communications Holdings, Inc. of Debt
 Securities of L-3 Communications Corporation and
 Guarantees of Subsidiary Guarantors of Debt Securities
 of L-3 Communications Holdings, Inc. and L-3
 Communications Corporation ...........................               (4)                  (4)                     (4)         None
- ------------------------------------------------------------------------------------------------------------------------------------
Common Stock(5) ....................................... 500,000 shares(6)         $  111.26(7)      $    55,630,000(7) $   5,117.96*
- ------------------------------------------------------------------------------------------------------------------------------------




*     Paid on March 22, 2002


(1)   Pursuant to General Instructions II. D to Form S-3, the Amount to be
      Registered, the Proposed Maximum Aggregate Offering Price Per Security and
      Proposed Maximum Aggregate Offering Price have been omitted for each class
      of securities which are registered hereby, other than with respect to the
      specified shares of common stock to be sold by the selling stockholders.


(2)   The debt securities of L-3 Communications Holdings and L-3 Communications
      Corporation registered hereby include such additional amount as may be
      necessary so that, if debt securities of L-3 Communications Holdings and
      L-3 Communications Corporation are issued with an original issue discount,
      the aggregate initial offering prices of all debt securities of L-3
      Communications Holdings and L-3 Communications Corporation will equal no
      more than $1,000,000,000. The initial public offering price of any debt
      securities of L-3 Communications Holdings and L-3 Communications
      Corporation denominated in any foreign currency shall be the U.S. dollar
      equivalent thereof based on the prevailing exchange rates at the
      respective times such securities are first offered. There are also being
      registered hereunder an indeterminate number of shares of common stock as
      shall be issuable upon conversion or redemption of preferred stock or debt
      securities of L-3 Communications Holdings registered hereby.


(3)   Estimated solely for purposes of calculating the registration fee.


(4)   No separate consideration will be received for the guarantees. Pursuant to
      Rule 457(n) of the Securities Act of 1933 there is no filing fee with
      respect to the guarantees.


(5)   Represents shares of common stock to be sold by certain selling
      stockholders identified herein.


(6)   On April 23, 2002, the board of directors of L-3 Communications Holdings
      announced a two-for-one stock split to shareholders of record on May 6,
      2002. Upon consummation of the stock split the 500,000 shares of common
      stock registered hereby shall, pursuant to Rule 416(b) under the
      Securities Act, be deemed to cover the additional 500,000 shares of common
      stock to be issued in connection with the two-for-one stock split.


(7)   Estimated solely for the purpose of determining the registration fee and
      calculated in accordance with Rule 457(c) under the Securities Act on the
      basis of the last price of L-3 Communications Holdings' common stock on
      March 22, 2002.



Any securities registered hereunder may be sold separately or as units with
other securities registered hereunder.

                                --------------
     THE REGISTRANTS HEREBY AMEND THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANTS
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS REGISTRATION
STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH SECTION 8(a) OF
THE SECURITIES ACT OR UNTIL THIS REGISTRATION STATEMENT SHALL BECOME EFFECTIVE
ON SUCH DATE AS THE SECURITIES AND EXCHANGE COMMISSION, ACTING PURSUANT TO SAID
SECTION 8(a), MAY DETERMINE.
                                --------------


                         TABLE OF ADDITIONAL REGISTRANTS





                                                     STATE OR OTHER                          ADDRESS, INCLUDING ZIP CODE,
                                                     JURISDICTION OF      IRS EMPLOYER      AND TELEPHONE NUMBER, INCLUDING
EXACT NAME OF REGISTRANT                            INCORPORATION OR     IDENTIFICATION       AREA CODE, OF REGISTRANT'S
AS SPECIFIED IN ITS CHARTER                           ORGANIZATION           NUMBER           PRINCIPAL EXECUTIVE OFFICES
- ------------------------------------------------   ------------------   ----------------   --------------------------------
                                                                                  
AMI Instruments, Inc.                                   Oklahoma        73-1122637         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111
Apcom, Inc.                                             Maryland        52-1291447         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111
Celerity Systems Incorporated                          California       77-0365380         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111
Coleman Research Corporation                             Florida        59-2039476         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111
EER Systems, Inc.                                       Virginia        54-1349668         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111
Electrodynamics, Inc                                     Arizona        36-3140903         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111
Henschel, Inc.                                          Delaware        23-2554418         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111
Hygienetics Environmental Services, Inc.                Delaware        13-3992505         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111
Interstate Electronics Corporation                     California       95-1912832         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111
KDI Precision Products, Inc.                            Delaware        31-0740721         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111
L-3 Communications AIS GP Corporation                   Delaware        13-4137187         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111
L-3 Communications Analytics Corporation               California       54-1035921         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111
L-3 Communications Atlantic Science and                New Jersey       22-2547554         600 Third Avenue
 Technology Corporation                                                                    New York, NY 10016
                                                                                           (212) 697-1111
L-3 Communications Aydin Corporation                    Delaware        23-1686808         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111
L-3 Communications DBS Microwave, Inc.                 California       68-0281617         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111
L-3 Communications ESSCO, Inc.                          Delaware        04-2281486         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111
L-3 Communications ILEX Systems, Inc.                   Delaware        13-3992952         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111
L-3 Communications Investments, Inc.                    Delaware        51-0260723         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111
L-3 Communications SPD Technologies, Inc.               Delaware        23-2869511         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111
L-3 Communications Storm Control Systems, Inc.         California       77-0268547         600 Third Avenue
                                                                                           New York, NY 10016
                                                                                           (212) 697-1111







                                                 STATE OR OTHER                          ADDRESS, INCLUDING ZIP CODE,
                                                 JURISDICTION OF      IRS EMPLOYER      AND TELEPHONE NUMBER, INCLUDING
EXACT NAME OF REGISTRANT                        INCORPORATION OR     IDENTIFICATION       AREA CODE, OF REGISTRANT'S
AS SPECIFIED IN ITS CHARTER                       ORGANIZATION           NUMBER           PRINCIPAL EXECUTIVE OFFICES
- --------------------------------------------   ------------------   ----------------   --------------------------------
                                                                              
L-3 Communications Integrated Systems L.P.          Delaware        03-0391841         600 Third Avenue
                                                                                       New York, NY 10016
                                                                                       (212) 697-1111
Microdyne Communications Technologies               Maryland        59-3500774         600 Third Avenue
 Incorporated                                                                          New York, NY 10016
                                                                                       (212) 697-1111
Microdyne Corporation                               Maryland        52-0856493         600 Third Avenue
                                                                                       New York, NY 10016
                                                                                       (212) 697-1111
Microdyne Outsourcing Incorporated                  Maryland        33-0797639         600 Third Avenue
                                                                                       New York, NY 10016
                                                                                       (212) 697-1111
MPRI, Inc.                                          Delaware        54-1439937         600 Third Avenue
                                                                                       New York, NY 10016
                                                                                       (212) 697-1111
Pac Ord, Inc.                                       Delaware        23-2523436         600 Third Avenue
                                                                                       New York, NY 10016
                                                                                       (212) 697-1111
Power Paragon, Inc.                                 Delaware        33-0638510         600 Third Avenue
                                                                                       New York, NY 10016
                                                                                       (212) 697-1111
Southern California Microwave, Inc.                California       13-0478540         600 Third Avenue
                                                                                       New York, NY 10016
                                                                                       (212) 697-1111
SPD Holdings, Inc.                                  Delaware        23-2977238         600 Third Avenue
                                                                                       New York, NY 10016
                                                                                       (212) 697-1111
SPD Electrical Systems, Inc.                        Delaware        23-2457758         600 Third Avenue
                                                                                       New York, NY 10016
                                                                                       (212) 697-1111
SPD Switchgear, Inc.                                Delaware        23-2510039         600 Third Avenue
                                                                                       New York, NY 10016
                                                                                       (212) 697-1111




[SIDEBAR]
THE INFORMATION IN THIS PROSPECTUS IS NOT COMPLETE AND MAY BE CHANGED. WE MAY
NOT SELL THESE SECURITIES UNTIL THE REGISTRATION STATEMENT FILED WITH THE
SECURITIES AND EXCHANGE COMMISSION IS EFFECTIVE. THIS PROSPECTUS IS NOT AN OFFER
TO SELL THESE SECURITIES AND IS NOT SOLICITING AN OFFER TO BUY THESE SECURITIES
IN ANY STATE WHERE THE OFFER OR SALE IS NOT PERMITTED.
[END SIDEBAR]



                    SUBJECT TO COMPLETION, DATED MAY 3, 2002



PROSPECTUS


                                 $1,000,000,000

[GRAPHIC OMITTED]




                       L-3 COMMUNICATIONS HOLDINGS, INC.


                                  COMMON STOCK
                                 DEBT SECURITIES
                                 PREFERRED STOCK
                                    WARRANTS
                            STOCK PURCHASE CONTRACTS
                              STOCK PURCHASE UNITS


                       L-3 COMMUNICATIONS HOLDINGS, INC.
                        1,000,000 SHARES OF COMMON STOCK



                         L-3 COMMUNICATIONS CORPORATION
                           GUARANTEED DEBT SECURITIES

- --------------------------------------------------------------------------------
L-3 Communications Holdings, Inc. may offer and sell from time to time, in one
or more series, any one of the following securities:


    o  common stock,


    o  unsecured debt securities consisting of notes, debentures or other
       evidences of indebtedness which may be senior debt securities, senior
       subordinated debt securities or subordinated debt securities,


    o  preferred stock,


    o  warrants to purchase preferred stock, common stock or debt securities
       of L-3 Communications Holdings,


    o  stock purchase contracts, and


    o  stock purchase units,


or any combination of these securities. L-3 Communications Holdings' debt
securities may be guaranteed by substantially all of its wholly-owned domestic
subsidiaries.


     L-3 Communications Holdings' wholly-owned subsidiary, L-3 Communications
Corporation, may offer and sell from time to time, in one or more series of its
unsecured debt securities consisting of notes, debentures or other evidence of
indebtedness which may be senior debt securities, senior subordinated debt
securities or subordinated debt securities of L-3 Communications Corporation.
The debt securities issued by L-3 Communications Corporation will be fully and
unconditionally guaranteed by L-3 Communications Holdings and may be further
guaranteed by substantially all of L-3 Communications Corporation's wholly-owned
domestic subsidiaries.


     The selling stockholders identified on page 25 may sell from time to time
up to 1,000,000 shares of common stock of L-3 Communications Holdings owned by
them. The common stock of L-3 Communications Holdings trades on the New York
Stock Exchange under the symbol "LLL."



     We will provide more specific information about the terms of an offering of
any of these securities in supplements to this prospectus.


You should read this prospectus, particularly the Risk Factors beginning on page
5, and any supplement carefully before investing.


NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE SECURITIES
COMMISSION HAS APPROVED OR DISAPPROVED OF THESE SECURITIES OR DETERMINED IF THIS
PROSPECTUS IS TRUTHFUL OR COMPLETE. ANY REPRESENTATION TO THE CONTRARY IS A
CRIMINAL OFFENSE.
- --------------------------------------------------------------------------------



                                TABLE OF CONTENTS







                                           PAGE
                                          -----
                                       
Prospectus Summary ......................    3
Risk Factors ............................    5
The Company .............................   12
Ratio of Earnings to Fixed Charges and
   Earnings to Combined Fixed Charges and
   Preferred Stock Dividends ............   12
Use of Proceeds .........................   12
Dividend Policy .........................   13
Description of Debt Securities ..........   14
Description of Capital Stock ............   20





                                           PAGE
                                          -----
                                       
Description of Stock Purchase Contracts
   and Stock Purchase Units .............   24
Description of Warrants .................   24
Selling Stockholders ....................   25
Plan of Distribution ....................   26
Legal Matters ...........................   26
Experts .................................   26
Available Information ...................   26
Incorporation of Certain Documents by
   Reference ............................   27



                               ----------------

                              ABOUT THIS PROSPECTUS

     This prospectus describes the general terms of the securities to be offered
hereby. A prospectus supplement that will describe the specific amounts, prices
and other terms of the securities being offered will be provided to you in
connection with each sale of securities offered pursuant to this prospectus. The
prospectus supplement may also add, update or change information contained in
this prospectus. To understand the terms of securities offered pursuant to this
prospectus, you should carefully read this document with the applicable
prospectus supplement. Together, these documents will give the specific terms of
the offered securities. You should also read the documents we have incorporated
by reference in this prospectus described below under "Incorporation of Certain
Documents By Reference."



                                        2



                               PROSPECTUS SUMMARY



THE SECURITIES WE MAY OFFER


     This prospectus is part of a registration statement that we filed with the
Securities and Exchange Commission using a "shelf" registration process. Under
the shelf registration process, L-3 Communications Holdings may offer and sell
from time to time up to an aggregate of $1,000,000,000 of any of the following
securities:


     o   common stock;

     o   debt securities;

     o   preferred stock;

     o   stock purchase contracts;

     o   stock purchase units; and

     o   warrants.


In addition, L-3 Communications Corporation may offer and sell from time to time
its debt securities that will be guaranteed by L-3 Communications Holdings and
may be further guaranteed by certain of L-3 Communications Corporation's
subsidiaries. Additionally, certain selling stockholders named herein may offer
and sell from time to time up to an aggregate of 1,000,000 shares of L-3
Communications Holdings' common stock owned by them. See "Selling Stockholders".
We will not receive any proceeds from the sale of common stock by the selling
stockholders.


COMMON STOCK


     L-3 Communications Holdings may issue shares of its common stock, par value
$.01 per share. Holders of shares of L-3 Communications Holdings' common stock
are entitled to receive dividends when declared by the board of directors of L-3
Communications Holdings, subject to the rights of holders of L-3 Communications
Holdings' outstanding preferred stock, if any. Each holder of L-3 Communications
Holdings' common stock is entitled to one vote per share. The holders of L-3
Communications Holdings' common stock have no preemptive rights or cumulative
voting rights.

     In addition, certain selling stockholders named herein may offer and sell
from time to time up to an aggregate of 1,000,000 shares of L-3 Communications
Holdings' common stock owned by them.

     On April 23, 2002, the board of directors of L-3 Communications Holdings
declared a two-for-one stock split to shareholders of record on May 6, 2002. All
share numbers contained in this prospectus give effect to the consummation of
the stock split.



DEBT SECURITIES


     L-3 Communications Holdings may offer debt securities, which may be either
senior, senior subordinated or subordinated, and may be guaranteed by
substantially all of its wholly-owned domestic subsidiaries. L-3 Communications
Holdings may issue debt securities either separately, or together with, upon
conversion of or in exchange for other securities. L-3 Communications
Corporation may offer its debt securities, which may be either senior, senior
subordinated or subordinated and will be guaranteed by L-3 Communications
Holdings and may be further guaranteed by substantially all of L-3
Communications Corporation's wholly-owned domestic subsidiaries.

     The debt securities issued by L-3 Communications Holdings will be issued
under an indenture between L-3 Communications Holdings and The Bank of New York,
as trustee. The debt securities issued by L-3 Communications Corporation will be
issued under an indenture among L-3 Communications Corporation, L-3
Communications Holdings, as guarantor, and The Bank of New



                                        3



York, as trustee. We have summarized general features of the debt securities to
be issued by L-3 Communications Holdings and L-3 Communications Corporation
under "Description of Debt Securities." We encourage you to read the indentures,
forms of which are included as exhibits to the registration statement of which
this prospectus forms a part.



PREFERRED STOCK


     L-3 Communications Holdings may issue shares of its preferred stock, $.01
par value per share, in one or more series. L-3 Communications Holdings' board
of directors will determine the dividend, voting, conversion and other rights of
the series of preferred stock being offered.



STOCK PURCHASE CONTRACTS AND STOCK PURCHASE UNITS


     L-3 Communications Holdings may issue stock purchase contracts representing
contracts obligating holders to purchase from L-3 Communications Holdings and
L-3 Communications Holdings to sell to the holders a specified number of shares
of common stock or preferred stock of L-3 Communications Holdings at a future
date or dates. The price per share of common stock or preferred stock may be
fixed at the time the stock purchase contracts are issued or may be determined
by reference to a specific formula set forth in the stock purchase contracts.

     The stock purchase contracts may be issued separately or as a part of
units, often known as stock purchase units, consisting of a stock purchase
contract and either of the following:

     o   Debt securities of L-3 Communications Holdings, or


     o   Debt obligations of third parties, including U.S. Treasury securities,



securing the holder's obligations to purchase the common stock or preferred
stock of L-3 Communications Holdings under the stock purchase contracts.



WARRANTS


     L-3 Communications Holdings may issue warrants for the purchase of its debt
securities, preferred stock or common stock. L-3 Communications Holdings may
issue warrants independently or together with other securities. Each warrant
will entitle the holder to purchase the principal amount of its debt securities,
or the number of shares of its preferred stock or common stock at the exercise
price set forth in, or calculable as set forth in, the prospectus supplement.

                               ----------------

     L-3 Communications Holdings is incorporated in Delaware, and the address of
its principal executive offices is 600 Third Avenue, New York, New York 10016.
L-3 Communications Holdings' telephone number is (212) 697-1111.

     L-3 Communications Corporation is incorporated in Delaware, and the address
of its principal executive offices is 600 Third Avenue, New York, New York
10016. L-3 Communications Corporation's telephone number is (212) 697-1111.



                                        4





                                  RISK FACTORS


     Investing in the securities offered pursuant to this prospectus involves
risks, including the risks described in this prospectus and in the other
documents which are incorporated herein by reference. Additional risks,
including those that relate to any particular securities that L-3 Communications
Holdings or L-3 Communications Corporation will offer, will be included in the
applicable prospectus supplement. You should carefully consider the risk factors
before investing in any of the securities offered pursuant to this prospectus.

OUR SIGNIFICANT LEVEL OF DEBT MAY ADVERSELY AFFECT OUR FINANCIAL AND OPERATING
ACTIVITY.

     We have incurred substantial indebtedness to finance our acquisitions. As
of December 31, 2001, we had $1,325.0 million of outstanding debt, excluding
outstanding letters of credit (which aggregated $102.4 million) under our senior
credit facilities. As of March 31, 2002, we had $2,175.0 million of outstanding
debt, excluding outstanding letters of credit (which aggregated approximately
$166.6 million) under our senior credit facilities. In addition, available
borrowings under our bank credit facilities after reductions for outstanding
letters of credit were $497.6 million as of December 31, 2001 and approximately
$233.4 million as of March 31, 2002. The increase in our additional debt from
December 31, 2001 to March 31, 2002 was principally related to the financing of
our acquisition of Aircraft Integration Systems (AIS) business from the Raytheon
Company which we completed on March 8, 2002. Our ratios of earnings to fixed
charges and earnings to combined fixed charges and preferred stock dividends
were both 2.8 to 1.0 for the year ended December 31, 2001. In the future we may
borrow more money, subject to limitations imposed on us by our debt agreements.

     Our ability to make scheduled payments of principal and interest on our
indebtedness and to refinance our indebtedness depends on our future
performance. We do not have complete control over our future performance because
it is subject to economic, political, financial, competitive, regulatory and
other factors affecting the aerospace and defense industry. It is possible that
in the future our business may not generate sufficient cash flow from operations
to allow us to service our debt and make necessary capital expenditures. If this
situation occurs, we may have to sell assets, restructure debt or obtain
additional equity capital. We may not be able to do so or do so without
additional expense.

     Our level of indebtedness has important consequences to you and your
investment in the securities offered pursuant to this prospectus. These
consequences may include:


     o   requiring a substantial portion of our cash flow from operations to be
         used to pay interest and principal on our debt and therefore be
         unavailable for other purposes including capital expenditures, research
         and development and other investments;

     o   limiting our ability to obtain additional financing for acquisitions or
         working capital to make investments or other expenditures, which may
         limit our ability to carry out our acquisition strategy;

     o   higher interest expenses due to increases in interest rates on our
         borrowings that have variable interest rates;

     o   heightening our vulnerability to downturns in our business or in the
         general economy and restricting us from making acquisitions,
         introducing new technologies and products or exploiting business
         opportunities; and


     o   covenants that limit our ability to borrow additional funds, dispose of
         assets or pay cash dividends. Failure to comply with such covenants
         could result in an event of default which, if not cured or waived,
         could result in the acceleration of our outstanding indebtedness.

     Additionally, on December 31, 2001, we had contractual obligations,
including outstanding indebtedness, of $1,680.2 million and contingent
commitments, including outstanding letters of credit under our senior credit
facilities, of $261.1 million. These contractual obligations and contingent
commitments are described in our Annual Report on Form 10-K for the fiscal year
ended December 31, 2001, which is incorporated herein by reference.




                                        5




OUR ACQUISITION STRATEGY INVOLVES RISKS, AND WE MAY NOT SUCCESSFULLY IMPLEMENT
   OUR STRATEGY.


     We seek to acquire companies that complement our business. We may not be
able to continue to identify acquisition candidates on commercially reasonable
terms or at all. If we make additional acquisitions, we may not realize the
benefits anticipated from the acquisitions. Likewise, we may not be able to
obtain additional financing for acquisitions. Such additional financing could be
restricted by the terms of our debt agreements.

     The process of integrating acquired operations, including our recent
acquisitions, into our existing operations may result in unforeseen operating
difficulties and may require significant financial and managerial resources that
would otherwise be available for the ongoing development or expansion of our
existing operations. Possible future acquisitions could result in the incurrence
of additional debt and related interest expense, contingent liabilities and
amortization expenses related to certain purchased intangible assets, all of
which could result in an increase to our already significant level of
outstanding debt. We consider and execute strategic acquisitions on an ongoing
basis and may be evaluating acquisitions or engaged in acquisition negotiations
at any given time. We regularly evaluate potential acquisitions and joint
venture transactions, and, except as disclosed herein or in the documents
incorporated herein by reference, we have not entered into any agreements with
respect to any material transactions.


WE RELY ON SALES TO U.S. GOVERNMENT ENTITIES, AND THE LOSS OF SUCH CONTRACTS
WOULD RESULT IN A SIGNIFICANT DECREASE TO OUR REVENUE AND PROFITS.

     Our government sales are predominantly derived from contracts with agencies
of, and prime contractors to, the U.S. Government. Approximately 64.7%, or
$1,519 million, of our sales for the year ended December 31, 2001 were made
directly or indirectly to the U.S. Department of Defense. At December 31, 2001,
the number of contracts with a value exceeding $1.0 million was approximately
575. Our largest program is a long-term, fixed-price contract for secure
terminal equipment that we sell to the U.S. Armed Services, intelligence and
securities agencies that provided approximately 3.9% of our sales for the year
ended December 31, 2001. No other program provided more than 3.2% of our sales
for the year ended December 31, 2001. The loss of all or a substantial portion
of our sales to the U.S. Government would result in a significant decrease to
our revenue and profits.



OUR GOVERNMENT CONTRACTS ENTAIL CERTAIN RISKS.

     o   Government contracts are dependent upon the U.S. defense budget.


     The reduction in the U.S. defense budget in the early 1990s caused most
defense-related government contractors to experience decreased sales, increased
downward pressure on operating margins and, in certain cases, net losses. Our
predecessor company experienced a substantial decline in sales during that
period. A significant decline in U.S. military expenditures in the future could
result in a material decrease to our sales, earnings and cash flow. The loss or
significant reduction in government funding of a large program in which we
participate could also result in a material decrease to our future sales,
earnings and cash flows and thus limit our ability to satisfy our financial
obligations, including those relating to the securities offered by this
prospectus. U.S. Government contracts are also conditioned upon the continuing
approval by Congress of the amount of necessary spending. Congress usually
appropriates funds for a given program each fiscal year even though contract
periods of performance may exceed one year. Consequently, at the beginning of a
major program, the contract is usually partially funded, and additional monies
are normally committed to the contract only if appropriations are made by
Congress for future fiscal years.


     o   Government contracts contain unfavorable termination provisions and are
         subject to audit and modification.

     Companies engaged primarily in supplying defense-related equipment and
services to U.S. Government agencies are subject to certain business risks
peculiar to the defense industry. These risks include the ability of the U.S.
Government to unilaterally:


                                        6


     o   suspend us from receiving new contracts pending resolution of alleged
         violations of procurement laws or regulations;

     o   terminate existing contracts;

     o   reduce the value of existing contracts;

     o   audit our contract-related costs and fees, including allocated indirect
         costs; and

     o   control and potentially prohibit the export of our products.

     All of our U.S. Government contracts can be terminated by the U.S.
Government either for its convenience or if we default by failing to perform
under the contract. Termination for convenience provisions provide only for our
recovery of costs incurred or committed, settlement expenses and profit on the
work completed prior to termination. Termination for default provisions provide
for the contractor to be liable for excess costs incurred by the U.S. Government
in procuring undelivered items from another source. Our contracts with foreign
governments generally contain similar provisions relating to termination at the
convenience of the customer.

     The U.S. Government may review our costs and performance on their
contracts, as well as our accounting and general business practices. Based on
the results of such audits, the U.S. Government may adjust our contract-related
costs and fees, including allocated indirect costs. In addition, under U.S.
Government purchasing regulations, some of our costs, including most financing
costs, amortization of goodwill, portions of research and development costs, and
certain marketing expenses may not be reimbursable under U.S. Government
contracts. Further, as a U.S. Government contractor, we are subject to
investigation, legal action and/or liability that would not apply to a
commercial company.

     o   Government contracts are subject to competitive bidding and we are
         required to obtain licenses for non-U.S. sales.


     We obtain many of our U.S. Government contracts through a competitive
bidding process. We may not be able to continue to win competitively awarded
contracts. In addition, awarded contracts may not generate sales sufficient to
result in our profitability. We are also subject to risks associated with the
following:


     o   the frequent need to bid on programs in advance of the completion of
         their design, which may result in unforeseen technological difficulties
         and/or cost overruns;

     o   the substantial time and effort including the relatively unproductive
         design and development required to prepare bids and proposals for
         competitively awarded contracts that may not be awarded to us;

     o   design complexity and rapid technological obsolescence; and

     o   the constant need for design improvement.


     In addition to these U.S. Government contract risks, we are required to
obtain licenses from U.S. Government agencies to export many of our products and
systems. Additionally, we are not permitted to export some of our products.
Failure to receive required licenses would eliminate our ability to sell our
products outside the United States.



OUR FIXED-PRICE AND COST-REIMBURSABLE CONTRACTS MAY COMMIT US TO UNFAVORABLE
TERMS.


     We provide our products and services primarily through fixed-price or
cost-reimbursable contracts. Fixed-price contracts provided 68.3% of our sales
for the year ended December 31, 2001. Under a fixed-price contract we agree to
perform the scope of work required by the contract for a predetermined contract
price. Although a fixed-price contract generally permits us to retain profits if
the total actual contract costs are less than the estimated contract costs, we
bear the risk that increased or unexpected costs may reduce our profit or cause
us to sustain losses on the contract. Therefore, we fully absorb cost overruns
on fixed-price contracts and this reduces our profit margin on



                                        7


the contract. Those cost overruns may result in a loss. A further risk
associated with fixed-price contracts is the difficulty of estimating sales and
costs that are related to performance in accordance with contract specifications
and the possibility of obsolescence in connection with long-term procurements.
Failure to anticipate technical problems, estimate costs accurately or control
costs during performance of a fixed-price contract may reduce our profitability
or cause a loss.


     Cost-reimbursable contracts provided 31.7% of our sales for the year ended
December 31, 2001. On a cost-reimbursable contract we are paid up to
predetermined funding levels determined by our customers, our allowable incurred
costs and generally a fee representing a profit on those costs, which can be
fixed or variable depending on the contract's pricing arrangement. Therefore,
unless costs exceed specified funding limitations, on a cost-reimbursable
contract we usually do not bear the risks of unexpected cost overruns. However,
U.S. Government regulations require that we notify our customer of any cost
overruns or underruns on a cost-reimbursable contract on a timely basis. If we
incur costs in excess of the funding limitation specified in a cost-reimbursable
contract, we may not be able to recover those cost overruns.

     We record sales and profits on substantially all of our contracts using
percentage-of-completion methods of accounting. As a result, revisions made to
our estimates of sales and profits are recorded in the period in which the
conditions that require such revisions become known and can be estimated;
accordingly, the revisions may have a material impact in any one period. Our
provisions for losses for our fixed-price contracts are based on estimates. To
the extent our actual contract losses exceed our estimates, our contract loss
provisions will not be adequate to cover all actual future losses.



OUR OPERATIONS INVOLVE RAPIDLY EVOLVING PRODUCTS AND TECHNOLOGICAL CHANGE.


     The rapid change of technology is a key feature of all of the industries in
which our businesses operate, including the commercial communications industry
in particular. To succeed in the future, we will need to continue to design,
develop, manufacture, assemble, test, market and support new products and
enhancements on a timely and cost-effective basis. Historically, our technology
has been developed through both customer-funded and internally funded research
and development. We may not be able to continue to maintain comparable levels of
research and development. In the past we have allocated substantial funds to
capital expenditures, programs and other investments. This practice will
continue to be required in the future. Even so, we may not be able to
successfully identify new opportunities and may not have the needed financial
resources to develop new products in a timely or cost-effective manner. At the
same time, products and technologies developed by others may render our products
and systems obsolete or non-competitive.



WE MAY NOT SUCCESSFULLY IMPLEMENT OUR PLAN TO EXPAND INTO COMMERCIAL MARKETS.


     Our revenues have primarily come from business with the U.S. Department of
Defense and other U.S. Government agencies. In addition to continuing to pursue
these market areas, we will continue applying our technical capabilities and
expertise to related commercial markets. Some of our commercial products, such
as airport security equipment, voyage recorders and Prime Wave fixed wireless
loop products, have only recently been introduced.


     These new commercial products are subject to certain risks and may require
      us to:

     o   develop and maintain marketing, sales and customer support
         capabilities;


     o   secure sales and customer support capabilities;

     o   obtain customer and/or regulatory certification;

     o   respond to rapidly changing technologies including those developed by
         others that may render our products and systems obsolete or
         non-competitive; and

     o   obtain customer acceptance of these products and product performance.

     Our efforts to expand our presence in commercial markets require
significant resources, including additional working capital and capital
expenditures, as well as the use of our management's time. Our


                                        8



ability to sell certain commercial products, particularly our broadband wireless
communications products, depends to a significant degree on the efforts of
independent distributors or communications service providers and on the
financial viability of our existing and target customers for the commercial
products. Certain of our existing and target customers are agencies or
affiliates of governments of emerging and under-developed countries or private
business enterprises operating in those countries. In addition, we have made
equity investments in entities that plan to commence operations as
communications service providers using some of our commercial products. These
distributors and service providers may not be able to market our products or
their services successfully and we may not be able to realize a return of
investment in them. We also may not be successful in addressing these risks or
in developing these commercial business opportunities.



CONSOLIDATION AND INTENSE COMPETITION IN THE INDUSTRIES IN WHICH OUR BUSINESSES
OPERATE COULD LIMIT OUR ABILITY TO ATTRACT AND RETAIN CUSTOMERS.


     The communications equipment industry and the other industries in which our
businesses operate, and the market for defense applications, is highly
competitive. The defense industry has experienced substantial consolidation due
to declining defense budgets and increasing pressures for cost reductions. We
expect that the U.S. Department of Defense's increased use of commercial
off-the-shelf products and components in military equipment will continue to
encourage new competitors to enter the market. We also expect that competition
for original equipment manufacturing business will increase due to the continued
emergence of merchant suppliers. Our ability to compete for defense contracts
largely depends on the following factors:


     o   the effectiveness and innovations of our research and development
         programs;

     o   our ability to offer better performance than our competitors at a lower
         cost to the U.S. Government; and

     o   the readiness of our facilities, equipment and personnel to undertake
         the programs for which we compete.

     In some instances, the U.S. Government directs all work for a particular
project to a single supplier, commonly known as a sole-source project. In such
cases, other suppliers who may otherwise be able to compete for the programs
involved can only do so if the U.S. Government chooses to reopen the particular
program to competition. Additionally, many of our competitors are larger than us
and have substantially greater financial and other resources than we have.


OUR DEBT AGREEMENTS RESTRICT OUR ABILITY TO FINANCE OUR FUTURE OPERATIONS AND,
IF WE ARE UNABLE TO MEET OUR FINANCIAL RATIOS, COULD CAUSE OUR EXISTING DEBT TO
BE ACCELERATED.

     Our debt agreements contain a number of significant provisions that, among
other things, restrict our ability to:

     o   sell assets;

     o   incur more indebtedness;

     o   repay certain indebtedness;

     o   pay dividends;

     o   make certain investments or acquisitions;

     o   repurchase or redeem capital stock;

     o   engage in mergers or consolidations; and

     o   engage in certain transactions with subsidiaries and affiliates.

     These restrictions could hurt our ability to finance our future operations
or capital needs or engage in other business activities that may be in our
interest. In addition, some of our debt


                                        9


agreements also require us to maintain compliance with certain financial ratios,
including total consolidated earnings before interest, taxes, depreciation and
amortization to total consolidated cash interest expense and total consolidated
debt to total consolidated earnings before interest, taxes, depreciation and
amortization, and to limit our capital expenditures. Our ability to comply with
these ratios and limits may be affected by events beyond our control. A breach
of any of these agreements or our inability to comply with the required
financial ratios or limits could result in a default under those debt
agreements. In the event of any such default, the lenders under those debt
agreements could elect to:

     o   declare all outstanding debt, accrued interest and fees to be due and
         immediately payable;

     o   require us to apply all of our available cash to repay our outstanding
         senior debt; and

     o   prevent us from making debt service payments on our other debt.


     If we were unable to repay any of these borrowings when due, the lenders
under our senior credit facilities could proceed against their collateral, which
consists of a first priority security interest in the capital stock of our
material subsidiaries, including L-3 Communications Corporation. If the
indebtedness under the existing debt agreements were to be accelerated, our
assets may not be sufficient to repay such indebtedness in full.



IF WE ARE UNABLE TO ATTRACT AND RETAIN KEY MANAGEMENT AND PERSONNEL, WE MAY
BECOME UNABLE TO OPERATE OUR BUSINESS EFFECTIVELY.


     Our future success depends to a significant degree upon the continued
contributions of our management, including Messrs. Lanza and LaPenta, and our
ability to attract and retain other highly qualified management and technical
personnel. We do not maintain any key person life insurance policies for members
of our management. As of May 1, 2002, Messrs. Lanza and LaPenta beneficially
owned, in the aggregate 12.2% of the outstanding common stock of L-3
Communications Holdings. We have entered into employment agreements with Messrs.
Lanza and LaPenta. We face competition for management and technical personnel
from other companies and organizations. Failure to attract and retain such
personnel would damage our prospects.



ENVIRONMENTAL LAWS AND REGULATION MAY SUBJECT US TO SIGNIFICANT LIABILITY.

     Our operations are subject to various U.S. federal, state and local as well
as certain foreign environmental laws and regulations within the countries in
which we operate relating to the discharge, storage, treatment, handling,
disposal and remediation of certain materials, substances and wastes used in our
operations.


     New laws and regulations, stricter enforcement of existing laws and
regulations, the discovery of previously unknown contamination or the imposition
of new clean-up requirements may require us to incur a significant amount of
additional costs in the future and could decrease the amount of free cash flow
available to us for other purposes, including capital expenditures, research and
development and other investments.



TERMINATION OF OUR BACKLOG OF ORDERS COULD NEGATIVELY IMPACT OUR SALES.


     We currently have a backlog of orders, primarily under contracts with the
U.S. Government. The U.S. Government may unilaterally modify or terminate these
contracts. Accordingly, most of our backlog could be modified or terminated by
the U.S. Government. Therefore, existing backlog may not result in sales.
Further, any margin we record on sales from any contract included in backlog
may not be profitable.



OUR PENSION PLAN LIABILITIES MAY RESULT IN SIGNIFICANT EXPENSES.

     We have assumed certain liabilities relating to defined benefit pension
plans for present and former employees and retirees of certain businesses which
we acquired. Prior to our formation,


                                       10


Lockheed Martin received a letter from the Pension Benefit Guaranty Corporation
(the "PBGC") which requested information regarding the transfer of these pension
plans and indicated that the PBGC believed certain of these pension plans were
underfunded using its actuarial assumptions. These assumptions resulted in a
larger liability for accrued benefits than the assumptions used for financial
reporting under Statement of Financial Accounting Standards No. 87.


     With respect to these plans, Lockheed Martin entered into an agreement with
us and the PBGC dated as of April 30, 1997. Under that agreement, Lockheed
Martin agreed, upon the occurrence of certain circumstances, either to:


     o   assume sponsorship of the subject plans; or


     o   provide another form of financial support.



     If Lockheed Martin did assume sponsorship of these plans, it would be
primarily liable for the costs associated with funding these plans or any costs
associated with the termination of them, but we would be required to reimburse
Lockheed Martin for its obligations. Should Lockheed Martin assume sponsorship
of the subject plans, or if these plans were terminated, the impact of any
increased pension expenses or funding requirements could reduce the amount of
free cash flow available to us.



THIS PROSPECTUS CONTAINS FORWARD-LOOKING STATEMENTS, WHICH MAY NOT BE CORRECT.


     Certain of the matters discussed concerning our operations, economic
performance and financial condition, including in particular, the likelihood of
our success in developing and expanding our business and the realization of
sales from backlog, include forward-looking statements within the meaning of
Section 27A of the Securities Act and Section 21E of the Securities Exchange Act
of 1934 ("Exchange Act"). Statements that are predictive in nature, that depend
upon or refer to future events or conditions or that include words such as
"expects," "anticipates," "intends," "plans," "believes," "estimates" and
similar expressions are forward-looking statements. Although we believe that
these statements are based upon reasonable assumptions, we can give no assurance
that their goals will be achieved.


                                       11


                                   THE COMPANY


     We are a leading merchant supplier of sophisticated secure communication
systems and specialized products. We produce secure, high data rate
communication systems, training and simulation systems, engineering development
and integration support, avionics and ocean products, fuzing products,
telemetry, instrumentation, space and guidance products and microwave
components. These systems and products are critical elements of virtually all
major communication, command and control, intelligence gathering and space
systems. Our systems and specialized products are used to connect a variety of
airborne, space, ground-and sea-based communication systems and are used in the
transmission, processing, recording, monitoring and dissemination functions of
these communication systems. Our customers include the U.S. Department of
Defense, certain U.S. Government intelligence agencies, major aerospace and
defense contractors, foreign governments, commercial customers and certain other
U.S. federal, state and local government agencies.

     L-3 Communications Holdings is a holding company and, except for its
outstanding 5.25% Convertible Senior Subordinated Notes due 2009 and for its
outstanding 4.00% Senior Subordinated Convertible Contingent debt securities
(CODES) due 2011, has no assets or liabilities and conducts no operations other
than through L-3 Communications Corporation. L-3 Communications Holdings has
guaranteed the bank credit facilities of L-3 Communications Corporation.



                    RATIO OF EARNINGS TO FIXED CHARGES AND
        EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS


     The ratio of earnings to fixed charges, deficiency of earnings to cover
fixed charges and earnings to combined fixed charges and preferred stock
dividends presented below should be read together with the financial statements
and the notes accompanying them and "Management's Discussion and Analysis of
Financial Condition and Results of Operations" found in the documents
incorporated or deemed incorporated by reference into this prospectus. In
calculating the ratio of earnings to fixed charges and earnings to combined
fixed charges and preferred stock dividends, earnings consist of income (loss)
before income taxes plus fixed charges. Fixed charges consist of interest on
indebtedness plus the amortization of deferred debt issuance costs and that
portion of lease rental expense representative of the interest element.
Preferred stock dividends are the pre-tax equivalent, at our effective tax rate,
of dividends earned on outstanding preferred stock.








                                                                L-3                                    PREDECESSOR COMPANY(1)
                               ---------------------------------------------------------------------- -----------------------
                                                      YEAR ENDED DECEMBER 31,(2)
                                                ---------------------------------------  NINE MONTHS
                                 THREE MONTHS                                               ENDED           THREE MONTHS
                                     ENDED                                               DECEMBER 31,          ENDED
                                MARCH 31, 2002     2001      2000      1999      1998      1997(3)         MARCH 31, 1997
                               ---------------- --------- --------- --------- --------- ------------- -----------------------
                                                                                 
Ratio of Earnings to Fixed
 Charges:                            2.5x           2.8x      2.3x      2.4x      2.0x        1.7x               ___(4)
Ratio of Earnings to Combined
 Fixed Charges and Preferred
 Stock Dividends:                    2.5x           2.8x      2.3x      2.4x      2.0x        1.7x               ___(4)



- ----------

  (1)   The predecessor company refers to the ten initial business units we
        purchased from Lockhead Martin Corporation in 1997.

  (2)   Our results of operations are impacted significantly by our
        acquisitions, which are described in this prospectus or in documents
        incorporated herein by reference.

  (3)   Reflects the acquisition of our predecessor company and the commencement
        of our operations effective April 1, 1997.

  (4)   Earnings were insufficient to cover fixed charges and combined fixed
        charges and preferred stock dividends by $0.5 million for the three
        months ended March 31, 1997.



                                 USE OF PROCEEDS


     Unless otherwise indicated in a prospectus supplement, L-3 Communications
Holdings and L-3 Communications Corporation, as the case may be, will use all or
a portion of the net proceeds from



                                       12



the sale of the offered securities for general working capital purposes,
including acquisitions. General working capital purposes may include repayment
of other debt, capital expenditures, possible acquisitions and any other
purposes that may be stated in any prospectus supplement. The net proceeds may
be invested temporarily or applied to repay short-term or revolving debt until
they are used for their stated purposes.


     We will not receive any proceeds from the sale of any shares of common
stock offered by the selling stockholders.



                                 DIVIDEND POLICY



     L-3 Communications Holdings currently intends to retain its earnings to
finance future growth and, therefore, does not anticipate paying any cash
dividends on its common stock in the foreseeable future. Any determination as to
the payment of dividends will depend upon the future results of operations,
capital requirements and financial condition of L-3 Communications Holdings and
its subsidiaries and such other facts as the board of directors of L-3
Communications Holdings may consider, including any contractual or statutory
restrictions on L-3 Communications Holdings' ability to pay dividends. Moreover,
L-3 Communications Holdings is a holding company and its ability to pay
dividends is dependent upon receipt of dividends, distributions, advances, loans
or other cash transfers from L-3 Communications Corporation. Certain outstanding
debt instruments of L-3 Communications Corporation limit its ability to pay
dividends or other distributions on L-3 Communications Corporation's common
stock or to make advances, loans or other cash transfers to L-3 Communications
Holdings.



                                       13



                         DESCRIPTION OF DEBT SECURITIES


     The following description of the terms of the debt securities summarizes
certain general terms that will apply to the debt securities offered by L-3
Communications Holdings or by L-3 Communications Corporation, as the case may
be. The description is not complete, and we refer you to the indentures, forms
of which are included as exhibits to the registration statement of which this
prospectus is a part. In addition, the terms described below may be amended,
supplemented or otherwise modified pursuant to one or more supplemental
indentures. Any such amendments, supplements or modifications will be set forth
in the applicable prospectus supplement. For your reference, in several cases
below we have noted the section in the indentures that the paragraph summarizes.
Capitalized items have the meanings assigned to them in the indentures. The
referenced sections of the indentures and the definitions of capitalized terms
are incorporated by reference in the following summary.

     The debt securities issued by L-3 Communications Corporation will be
senior, senior subordinated or subordinated debt of L-3 Communications
Corporation and will be guaranteed by L-3 Communications Holdings and may be
further guaranteed by substantially all of L-3 Communications Corporation's
wholly-owned domestic subsidiaries. The debt securities issued by L-3
Communications Holdings will be senior, senior subordinated or subordinated debt
of L-3 Communications Holdings and may be guaranteed by substantially all of its
wholly-owned domestic subsidiaries. L-3 Communications Holdings may issue debt
securities either separately, or together with, upon conversion of or in
exchange for other securities.

     The debt securities issued by L-3 Communications Holdings will be issued
under an indenture between L-3 Communications Holdings and The Bank of New York,
as Trustee (the "Holdings Indenture"). The debt securities to be issued by L-3
Communications Corporation will be issued under an indenture among L-3
Communications Corporation, L-3 Communications Holdings, as guarantor, and The
Bank of New York, as trustee (the "Communications Indenture," and together with
the Holdings Indenture referred to herein as the "Indentures"). The Indentures
are substantially identical, except for the provisions relating to L-3
Communications Holdings' guarantee of the debt securities that may be issued by
L-3 Communications Corporation. For purposes of the summary set forth below,
obligors refers to L-3 Communications Holdings in the case of debt securities
issued by L-3 Communications Holdings pursuant to the Holdings Indenture and L-3
Communications Corporation and L-3 Communications Holdings, as guarantor, in the
case of debt securities issued by L-3 Communications Corporation pursuant to the
Communications Indenture. This summary of the Indentures is qualified by
reference to the Indentures. You should refer to the Indentures in addition to
reading this summary. The summary is not complete and is subject to the specific
terms of the Indentures.



GENERAL


     Under the Holdings Indenture and the Communications Indenture, L-3
Communications Holdings and L-3 Communications Corporation, respectively, will
be able to issue from time to time in one or more series an unlimited amount of
debt securities. Each time that L-3 Communications Holdings or L-3
Communications Corporation issues a new series of debt securities, the
supplement to the prospectus relating to that new series will specify the terms
of those debt securities, including:


     o   Designation, amount and denominations;


     o   Percentage of principal amount at which debt securities will be issued;


     o   Maturity date;

     o   Interest rate and payment dates;


     o   Terms and conditions of exchanging or converting debt securities for
         other securities;


     o   Currency of issue;

     o   Redemption terms;


     o   Whether the debt securities will be guaranteed by subsidiaries of L-3
         Communications Holdings or L-3 Communications Corporation, as the case
         may be;



                                       14




     o   Whether the debt securities and/or any guarantees will be senior,
         senior subordinated or subordinated; and

     o   Any other specific terms of the debt securities, including any deleted,
         modified or additional events of default or remedies or additional
         covenants provided with respect to the debt securities, and any terms
         that may be required by or advisable under applicable laws or
         regulations.

     Unless otherwise specified in any prospectus supplement, the debt
securities will be issuable in registered form without coupons and in
denominations of $1,000 and any integral multiple thereof. No service charge
will be made for any transfer or exchange of any debt securities, but the issuer
may require payment of a sum sufficient to cover any tax or other governmental
charge payable in connection therewith.

     Debt securities may bear interest at a fixed rate or a floating rate. Debt
securities bearing no interest or interest at a rate that at the time of
issuance is below the prevailing market rate may be sold at a discount below
their stated principal amount. Special United States federal income tax
considerations applicable to discounted debt securities or to some debt
securities issued at par that are treated as having been issued at a discount
for United States federal income tax purposes will be described in the
applicable prospectus supplement.

     In determining whether the holders of the requisite aggregate principal
amount of outstanding debt securities of any series have given any request,
demand, authorization, direction, notice, consent or waiver under the
Indentures, the principal amount of any series of debt securities originally
issued at a discount from their stated principal amount that will be deemed to
be outstanding for such purposes will be the amount of the principal thereof
that would be due and payable as of the date of the determination upon a
declaration of acceleration of the maturity thereof.

     Payments relating to the debt securities generally will be paid by L-3
Communications Holdings or L-3 Communications Corporation, as the case may be,
at The Bank of New York's corporate trust office. However, L-3 Communications
Holdings or L-3 Communications Corporation, as the case may be, may elect to pay
interest by mailing checks directly to the registered holders of the debt
securities. You can transfer your debt securities at The Bank of New York's
corporate trust office.



RANKING


     Unless otherwise described in the prospectus supplement for any series, the
debt securities issued by L-3 Communications Holdings or L-3 Communications
Corporation, as the case may be, will be unsecured and will rank on a parity
with all of the other unsecured and unsubordinated indebtedness issued by L-3
Communications Holdings or L-3 Communications Corporation, as the case may be.

     L-3 Communications Holdings is a holding company and conducts all of its
operations through subsidiaries. L-3 Communications Corporation, L-3
Communications Holdings' wholly-owned subsidiary, conducts a material amount of
operations through its subsidiaries. L-3 Communications Holdings' and L-3
Communications Corporation's right to participate as a shareholder in any
distribution of assets of any subsidiary (and thus the ability of holders of the
debt securities issued by L-3 Communications Holdings or L-3 Communications
Corporation, as the case may be, to benefit as creditors of L-3 Communications
Holdings or L-3 Communications Corporation, as the case may be, from such
distribution) is junior to creditors of that subsidiary. As a result, claims of
holders of the debt securities issued by L-3 Communications Holdings or L-3
Communications Corporation will generally have a junior position to claims of
creditors of L-3 Communications Holdings' or L-3 Communications Corporation's
subsidiaries, except to the extent that L-3 Communications Holdings or L-3
Communications Corporation, as the case may be, may be recognized as a creditor
of those subsidiaries or those subsidiaries guarantee the debt securities.



REOPENING OF ISSUE


     L-3 Communications Holdings and L-3 Communications Corporation, as the case
may be, may, from time to time, reopen an issue of debt securities without the
consent of the holders of the debt



                                       15




securities and issue additional debt securities with the same terms (including
maturity and interest payment terms) as debt securities issued on an earlier
date. After such additional debt securities are issued they will be fungible
with the previously issued debt securities to the extent specified in the
applicable prospectus supplement.



DEBT GUARANTEES


     L-3 Communications Holdings will fully and unconditionally guarantee,
pursuant to the Communications Indenture, the due and prompt payment of the
principal of and premium, if any, and interest on the debt securities issued by
L-3 Communications Corporation when and as the same shall become due and
payable, whether at the stated maturity, by declaration of acceleration, call
for redemption or otherwise. Debt securities of L-3 Communications Holdings may
be guaranteed by, and debt securities of L-3 Communications Corporation may be
further guaranteed by, additional subsidiaries of L-3 Communications Holdings,
the "subsidiary guarantors". If debt securities are guaranteed by subsidiary
guarantors, that guarantee will be set forth in the applicable Indenture or a
supplemental indenture.

     Payments with respect to the guarantee by L-3 Communications Holdings of
the senior subordinated debt securities and subordinated debt securities issued
by L-3 Communications Corporation will be subordinated in right of payment to
the prior payment in full of all senior indebtedness of L-3 Communications
Holdings to the same extent and manner that payments with respect to the senior
subordinated debt securities and subordinated debt securities issued by L-3
Communications Corporation are subordinated in right of payment to the prior
payment in full of all senior indebtedness of L-3 Communications Corporation.
Likewise, payments with respect to subsidiary guarantees of senior subordinated
debt securities and subordinated debt securities of L-3 Communications Holdings
and L-3 Communications Corporation, as the case may be, will be subordinated in
right of payment to the prior payment in full of all senior indebtedness of each
such subsidiary guarantor to the same extent and manner that payments with
respect to the senior subordinated debt securities and subordinated debt
securities of L-3 Communications Holdings and L-3 Communications Corporation, as
the case may be, are subordinated in right of payment to the prior payment in
full of all senior indebtedness of the issuer of such debt securities.



MERGER AND CONSOLIDATION


     Unless otherwise described in the prospectus supplement of any series, each
of L-3 Communications Holdings and L-3 Communications Corporation may under the
applicable Indenture, without the consent of the holders of debt securities,
consolidate with, merge with or into or transfer all or substantially all of its
assets to any other corporation organized under the laws of the United States or
any of its political subdivisions provided that:

     o   the surviving corporation assumes all the obligations of L-3
         Communications Holdings and L-3 Communications Corporation, as the case
         may be, under the applicable Indenture;


     o   at the time of such transaction, no event of default, and no event
         which, after notice or lapse of time, would become an event of default,
         shall have happened and be continuing; and

     o   certain other conditions are met.


MODIFICATION


     Generally, the rights and obligations of L-3 Communications Holdings and
L-3 Communications Corporation, as the case may be, and the holders' rights may
be modified with the consent of holders of a majority of the outstanding debt
securities of each series affected by such modification. However, unless
otherwise described in the prospectus supplement of any series, no modification
or amendment may occur without the consent of the affected holder of a debt
security if that modification or amendment would do any of the following:

     o   Change the stated maturity date of the principal of, or any installment
         of interest on, any of the holder's debt securities.



                                       16



     o   Reduce the principal amount of, or the interest (or premium, if any)
         on, the debt security (including in the case of a discounted debt
         security, the amount payable upon acceleration of maturity or provable
         in bankruptcy).

     o   Change the currency of payment of the debt security.

     o   Impair the right to institute suit for the enforcement of any payment
         on the debt security or adversely affect the right of repayment, if
         any, at the option of the holder.

     o   Reduce the percentage of holders of debt securities necessary to modify
         or amend the Indentures or to waive any past default.


     o   Release a guarantor from its obligations under its guarantee, other
         than in accordance with the terms thereof.


     o   Modify the obligations of L-3 Communications Holdings or L-3
         Communications Corporation, as the case may be, to maintain an office
         or agency in New York City.

     A modification which changes a covenant or provision expressly included
solely for the benefit of holders of one or more particular series will not
affect the rights of holders of debt securities of any other series. (Section
9.02)

     Each Indenture provides that the obligors and The Bank of New York, as
trustee, may make modifications without the consent of the debt security
holders in order to do the following: (Section 9.01)

     o   Evidence the assumption by a successor entity of the obligations of any
         of the obligors under that Indenture.

     o   Convey security for the debt securities to The Bank of New York.

     o   Add covenants, restrictions or conditions for the protection of the
         debt security holders.

     o   Provide for the issuance of debt securities in coupon or fully
         registered form.

     o   Establish the form or terms of debt securities of any series.


     o   Cure any ambiguity or correct any defect in the applicable Indenture
         which does not adversely affect the interests of a holder.

     o   Evidence the appointment of a successor trustee or more than one
         trustee.


     o   Surrendering any right or power conferred upon L-3 Communications
         Holdings or L-3 Communications Corporation, as the case may be.


     o   Complying with the requirements of the Securities and Exchange
         Commission in order to maintain the qualification of the Indentures
         under the Trust Indenture Act of 1939, as amended.


     o   Adding or modifying any other provisions with respect to matters or
         questions arising under the Indentures which L-3 Communications
         Holdings or L-3 Communications Corporation, as the case may be, and The
         Bank of New York may deem necessary or desirable and which will not
         adversely affect the interests of holders of debt securities.

     o   Modify the existing covenants and events of default solely in respect
         of, or add new covenants or events of default that apply solely to,
         debt securities not yet issued and outstanding.

     o   To provide for guarantees of the debt securities and to specify the
         ranking of the obligations of the guarantors under their respective
         guarantees.



EVENTS OF DEFAULT


     In the Indentures, an event of default means, unless otherwise described in
the prospectus supplement of any series, any one of the following:



                                       17



     o   Failure to pay interest on a debt security for 30 days;


     o   Failure to pay principal and premium, if any, when due;

     o   Failure to pay or satisfy a sinking fund installment when due;


     o   Failure by L-3 Communications Holdings or L-3 Communications
         Corporation, as the case may be, or by a guarantor of the debt
         securities to perform any other covenant in the Indenture that
         continues for 60 days after receipt of notice;


     o   Certain events in bankruptcy, insolvency or reorganization; or

     o   A guarantee being held in any judicial proceeding to be unenforceable
         or invalid.


     An event of default relating to one series of debt securities does not
necessarily constitute an event of default with respect to any other series
issued under the applicable Indenture. If an event of default exists with
respect to a series of debt securities, The Bank of New York or the holders of
at least 25% of the outstanding debt securities of that series may declare the
principal of that series due and payable.

     Any event of default with respect to a particular series of debt securities
may be waived by the holders of a majority of the outstanding debt securities of
that series, except for a failure to pay principal premium or interest on the
debt security. (Sections 5.01, 5.02 and 5.08)

     The Bank of New York may withhold notice to the holder of the debt
securities of any default (except in payment of principal, premium, interest or
sinking fund payment) if The Bank of New York thinks it is in the interest of
the holders. (Section 6.02)

     Subject to the specific duties that arise under the applicable Indenture if
an event of default exists, The Bank of New York is not obligated to exercise
any of its rights or powers under the applicable Indenture at the request of the
holders of the debt securities unless they provide reasonable indemnity
satisfactory to it. (Sections 6.01 and 6.03) Generally, the holders of a
majority of the outstanding debt securities can direct the proceeding for a
remedy available to The Bank of New York or for exercising any power conferred
on The Bank of New York as the trustee. (Section 5.08)



TRUSTEE'S RELATIONSHIP


     The Bank of New York or its affiliates may from time to time in the future
provide banking and other services to L-3 Communications Holdings and L-3
Communications Corporation in the ordinary course of their business. The
Indentures provide that L-3 Communications Holdings or L-3 Communications
Corporation, as the case may be, will indemnify The Bank of New York against any
and all loss, liability claim, damage or expense incurred that arises from the
trust created by the applicable Indenture unless the loss, liability or expense
results from The Bank of New York's negligence or willful misconduct.
(Sections 6.01 and 6.07)



GLOBAL SECURITIES


     L-3 Communications Holdings and L-3 Communications Corporation may issue
some of the debt securities as global securities that will be deposited with a
depository identified in a prospectus supplement. Global securities may be
issued in registered form and may be either temporary or permanent. A prospectus
supplement will contain additional information about depository arrangements.

     Registered global securities will be registered in the depository's name or
in the name of its nominee. When L-3 Communications Holdings or L-3
Communications Corporation issues a global security, the depository will credit
that amount of debt securities to the investors that have accounts with the
depository or its nominee. The underwriters or the debt security holders' agent
will designate the accounts to be credited, unless the debt securities are
offered and sold directly by L-3 Communications Holdings or L-3 Communications
Corporation, in which case, L-3 Communications Holdings or L-3 Communications
Corporation, as the case may be, will designate the appropriate account to be
credited.



                                       18



     Investors who have accounts with a depository, and people who have an
interest in those institutions, are the beneficial owners of global securities
held by that particular depository.



     Neither L-3 Communications Holdings nor L-3 Communications Corporation will
maintain records regarding ownership or the transfer of global securities held
by a depository or to nominee. If you are the beneficial owner of global
securities held by a depository, you must get information directly from the
depository.


     As long as a depository is the registered owner of a global security, that
depository will be considered the sole owner of the debt securities represented
by that global security. Except as set forth below, beneficial owners of global
securities held by a depository will not be entitled to:


     o   Register the represented debt securities in their names;


     o   Receive physical delivery of the debt securities; or


     o   Be considered the owners or holders of the global security under the
         applicable Indenture.


     Payments on debt securities registered in the name of a depository or its
nominee will be made to the depositary or its nominee. (Section 2.03)



     When a depository receives a payment, it must immediately credit the
accounts in amounts proportionate to the account holders' interests in the
global security. The beneficial owners of a global security should, and are
expected to, establish standing instructions and customary practices with their
investor that has an account with the depository, so that payments can be made
with regard to securities beneficially held for them, much like securities held
for the accounts of customers in bearer form or registered in "street name."



     A global security can only be transferred in whole by the depository to a
nominee of such depository, or to another nominee of a depository. If a
depository is unwilling or unable to continue as a depository and L-3
Communications Holdings or L-3 Communications Corporation, as the case may be,
does not appoint a successor depository within (90) days, L-3 Communications
Holdings or L-3 Communications Corporation, as the case may be, will issue debt
securities in exchange for all of the global securities held by that depository.
In addition, L-3 Communications Holdings and L-3 Communications Corporation may
eliminate all global securities at any time and issue debt securities in
exchange for them. Further, L-3 Communications Holdings and L-3 Communications
Corporation may allow a depository to surrender a global security in exchange
for debt securities on any terms that are acceptable to them and the depository.
Finally, an interest in the global security is exchangeable for a definitive
debt security if an event of default has occurred as described above under
"Events of Default." (Section 3.07)


     If any of these events occur, L-3 Communications Holdings and L-3
Communications Corporation, as the case may be, will execute and The Bank of New
York will authenticate and deliver to the beneficial owners of the global
security in question a new registered security in an amount equal to and in
exchange for that person's beneficial interest in the exchange global security.
The depository will receive a new global security in an amount equal to the
difference, if any, between the amount of the surrendered global security and
the amount of debt securities delivered to the beneficial owners. Debt
securities issued in exchange for global securities will be registered in the
same names and in the same denominations as indicated by the depository's
records and in accordance with the instructions from its direct and indirect
participants. (Section 3.07)



     The laws of certain jurisdictions require some people who purchase
securities to actually take physical possession of those securities. The
limitations imposed by these laws may impair your ability to transfer your
beneficial interests in a global security.



                                       19


                          DESCRIPTION OF CAPITAL STOCK


GENERAL


     The current certificate of incorporation of L-3 Communications Holdings
authorizes 300,000,000 shares of common stock with a par value of $.01 per share
and 50,000,000 shares of preferred stock. As of May 1, 2002, the outstanding
capital stock of L-3 Communications Holdings consisted of 79,402,238 shares of
common stock. The following summaries of certain provisions of L-3
Communications Holdings' capital stock do not purport to be complete and are
subject to, and qualified in their entirety by (1) the provisions of the
certificate of incorporation, including the certificate of designations pursuant
to which any series of preferred stock may be issued, (2) the bylaws of L-3
Communications Holdings and (3) by applicable law.



COMMON STOCK


     Voting Rights. Holders of L-3 Communications Holdings' common stock are
entitled to one vote per share on all matters to be voted upon by stockholders
of L-3 Communications Holdings, and do not have cumulative voting rights.

     Dividend Rights. The holders of L-3 Communications Holdings' common stock
are entitled to receive ratably such dividends, if any, as may be declared from
time to time by the board of directors of L-3 Communications Holdings out of
funds legally available for that purpose, subject to preferences that may be
applicable to any outstanding preferred stock and any other provisions of L-3
Communications Holdings' certificate of incorporation. L-3 Communications
Holdings does not, however, anticipate paying any cash dividends in the
foreseeable future.

     Rights Upon Liquidation. In the event of any voluntary or involuntary
liquidation, dissolution or winding up of L-3 Communications Holdings, after
payment of the debts and other liabilities of L-3 Communications Holdings, and
subject to the rights of holders of shares of preferred stock, holders of common
stock are entitled to share in any distribution to the stockholders on a pro
rata basis.

     Miscellaneous. All of the outstanding shares of common stock of L-3
Communications Holdings are, and the shares of common stock offered hereby will
be, fully paid and non-assessable. Holders of common stock have no preemptive or
other rights to subscribe for additional shares. No shares of common stock are
subject to redemption or a sinking fund.


PREFERRED STOCK

     General. L-3 Communications Holdings' certificate of incorporation
authorizes its board of directors to cause preferred stock to be issued in one
or more series, without stockholder action. The board of directors of L-3
Communications Holdings is authorized to issue up to 50,000,000 shares of
preferred stock, par value $.01 per share, and can determine the number of
shares of each series, and the rights, preference and limitations of each
series. L-3 Communications Holdings may amend its certificate of incorporation
to increase the number of authorized shares of preferred stock in a manner
permitted by its certificate of incorporation and the Delaware General
Corporation Law.

     The particular terms of any series of preferred stock being offered by L-3
Communications Holdings under this shelf registration will be described in the
prospectus supplement relating to that series of preferred stock. Those terms
may include:

     o   The number of shares of the series of preferred stock being offered;

     o   The title and liquidation preference per share of that series of the
         preferred stock;

     o   The purchase price of the preferred stock;

     o   The dividend rate or method for determining such rate;

     o   The dates on which dividends will be paid;


                                       20



     o   Whether dividends on that series of preferred stock will be cumulative
         or noncumulative and, if cumulative, the dates from which dividends
         shall commence to accumulate;

     o   Any redemption or sinking fund provisions applicable to that series of
         preferred stock;

     o   Any conversion or exchange provisions applicable to that series of
         preferred stock;

     o   Whether L-3 Communications Holdings has elected to offer depositary
         shares with respect to that series of preferred stock; and

     o   Any additional dividend, liquidation, redemption, sinking fund and
         other rights and restrictions applicable to that series of preferred
         stock.

     If the terms of any series of preferred stock being offered differ from the
terms set forth herein, those terms will also be disclosed in the prospectus
supplement relating to that series of preferred stock. The following summary is
not complete. You should refer to the certificate of designations relating to
the series of the preferred stock for the complete terms of that preferred
stock. That certificate of designations will be filed with the Securities and
Exchange Commission promptly after the offering of the preferred stock.

     The preferred stock will, when issued, be fully paid and nonassessable.

     Voting Rights.  Except as indicated in the prospectus supplement, or
except as expressly required by applicable law, the holders of preferred stock
will not be entitled to vote.

     Dividend Rights. Holders of preferred stock of each series will be entitled
to receive, when, as and if declared by the board of directors of L-3
Communications Holdings, cash dividends at the rates and on the dates set forth
in the prospectus supplement. Dividend rates may be fixed or variable or both.
Different series of preferred stock may be entitled to dividends at different
dividend rates or based upon different methods of determination. Each dividend
will be payable to the holders of record as they appear on L-3 Communications
Holdings' stock books on record dates determined by the board of directors of
L-3 Communications Holdings. Dividends on any series of the preferred stock may
be cumulative or noncumulative, as specified in the prospectus supplement. If
the board of directors of L-3 Communications Holdings fails to declare a
dividend on any series of preferred stock for which dividends are noncumulative,
then the right to receive that dividend will be lost, and L-3 Communications
Holdings will have no obligation to pay the dividend for that dividend period,
whether or not dividends are declared for any future dividend period.

     No full dividends will be declared or paid on any series of preferred
stock, unless full dividends for the dividend period commencing after the
immediately preceding dividend payment date (and cumulative dividends still
owing, if any) have been or contemporaneously are declared and paid on all other
series of preferred stock that have the same rank as, or rank senior to, that
preferred stock. When those dividends are not paid in full, dividends will be
declared pro rata, so that the amount of dividends declared per share on that
series of preferred stock and on each other series of preferred stock having the
same rank as, or ranking senior to, that series of preferred stock will in all
cases bear to each other the same ratio that accrued dividends per share on that
series of preferred stock and the other preferred stock bear to each other. In
addition, generally, unless full dividends, including cumulative dividends still
owing, if any, on all outstanding shares of any series of preferred stock have
been paid, no dividends will be declared or paid on the common stock and
generally L-3 Communications Holdings may not redeem or purchase any common
stock. No interest, or sum of money in lieu of interest, will be paid in
connection with any dividend payment or payments which may be in arrears.


     Unless otherwise described in the prospectus supplement, the amount of
dividends payable for each dividend period will be computed by annualizing the
applicable dividend rate and dividing by the number of dividend periods in a
year, except that the amount of dividends payable for the initial dividend
period or any period shorter than a full dividend period shall be computed on
the basis of a 360-day year consisting of twelve 30-day months and, for any
period less than a full month, the actual number of days elapsed in the period.



                                       21



     Rights Upon Liquidation. In the event L-3 Communications Holdings
liquidates, dissolves or winds-up its affairs, either voluntarily or
involuntarily, the holders of each series of preferred stock will be entitled to
receive liquidating distributions in the amount set forth in the prospectus
supplement relating to each series of preferred stock, plus an amount equal to
accrued and unpaid dividends, if any, before any distribution of assets is made
to the holders of L-3 Communications Holdings' common stock. If the amounts
payable with respect to preferred stock of any series and any stock having the
same rank as that series of preferred stock are not paid in full, the holders of
preferred stock and of such other stock will share ratably in any such
distribution of assets in proportion to the full respective preferential amounts
to which they are entitled. After the holders of each series of preferred stock
and any stock having the same rank as the preferred stock are paid in full, they
will have no right or claim to any of L-3 Communications Holdings' remaining
assets unless otherwise specified in the applicable prospectus supplement.
Neither the sale of all or substantially all of L-3 Communications Holdings'
property or business nor a merger or consolidation by L-3 Communications
Holdings with any other corporation will be considered a dissolution,
liquidation or winding up by L-3 Communications Holdings of its business
affairs.

     Redemption. Any series of preferred stock may be redeemable, in whole or in
part, at the option of L-3 Communications Holdings. In addition, any series of
preferred stock may be subject to mandatory redemption, including pursuant to a
sinking fund. The redemption provisions that may apply to a series of preferred
stock, including the redemption dates and the redemption prices for that series,
will be set forth in the prospectus supplement.

     If a series of preferred stock is subject to mandatory redemption, the
prospectus supplement will specify (1) the year L-3 Communications Holdings can
begin to redeem shares of the preferred stock, (2) the number of shares of the
preferred stock that L-3 Communications Holdings can redeem each year, and (3)
the redemption price per share. L-3 Communications Holdings may pay the
redemption price in cash, stock or in cash that it has received specifically
from the sale of its capital stock, as specified in the prospectus supplement.
If the redemption price is to be paid only from the proceeds of the sale of its
capital stock, the terms of the series of preferred stock may also provide that,
if no such capital stock is sold or if the amount of cash received is
insufficient to pay in full the redemption price then due, the series of
preferred stock will automatically be converted into shares of the applicable
capital stock pursuant to conversion provisions specified in the prospectus
supplement.

     If fewer than all the outstanding shares of any series of preferred stock
are to be redeemed, whether by mandatory or optional redemption, the board of
directors of L-3 Communications Holdings will determine the method for selecting
the shares to be redeemed, which may be by lot or pro rata or by any other
method determined to be equitable. From and after the redemption date, dividends
will cease to accrue on the shares of preferred stock called for redemption and
all rights of the holders of those shares other than the right to receive the
redemption price will cease.

     In the event that full dividends, including accrued but unpaid dividends,
if any, have not been paid on any series of preferred stock, L-3 Communications
Holdings may not redeem that series in part and may not purchase or acquire any
shares of that series of preferred stock, except by any offer made on the same
terms to all holders of that series of preferred stock.

     Miscellaneous. The preferred stock will, when issued, be fully paid and
nonassessable. The preferred stock will have no preemptive rights.


TRANSFER AGENT AND REGISTRAR


     The transfer agent and registrar for L-3 Communications Holdings' common
stock is EquiServe Trust Company, N.A. The transfer agent and registrar for L-3
Communications Holdings' preferred stock will be set forth in the applicable
prospectus supplement.

ANTI-TAKEOVER EFFECTS OF PROVISIONS OF L-3 COMMUNICATIONS HOLDINGS' CHARTER AND
   BYLAWS

     The certificate of incorporation of L-3 Communications Holdings provides
for its board of directors to be divided into three classes, with staggered
three-year terms. As a result, only one class



                                       22



of directors will be elected at each annual meeting of stockholders, with the
other classes continuing for the remainder of their respective three-year terms.
Stockholders have no cumulative voting rights, and the stockholders representing
a majority of the shares of common stock outstanding are able to elect all of
the directors.

     The certificate of incorporation of L-3 Communications Holdings also
requires that any action required or permitted to be taken by its stockholders
must be effected at a duly called annual or special meeting of the stockholders
and may not be effected by a consent in writing. The stockholders of L-3
Communications Holdings may amend the bylaws of L-3 Communications Holdings or
adopt new bylaws, by the affirmative vote of 66 2/3% of the outstanding voting
securities. A special meeting of the stockholders may be called by L-3
Communications Holdings' Chairman, Chief Executive Officer or stockholders
owning 10% or more of the outstanding voting capital stock. These provisions may
have the effect of delaying, deferring or preventing a change in control.

     The classification of the board of directors and lack of cumulative voting
will make it more difficult not only for another party to obtain control of L-3
Communications Holdings by replacing its board of directors, but also for its
existing stockholders to replace the board of directors. Since the board of
directors has the power to retain and discharge its officers, these provisions
could also make it more difficult for existing stockholders or another party to
effect a change in management.

     L-3 Communications Holdings' anti-takeover and other provisions may have
the effect of deterring hostile takeovers or delaying changes in control or
management. They are intended to enhance the likelihood of continued stability
in the composition of its board of directors and in the policies of its board of
directors and to discourage certain types of transactions that may involve an
actual or threatened change in control. Additionally, these provisions are
designed to reduce L-3 Communications Holdings' vulnerability to an unsolicited
acquisition proposal. The provisions also are intended to discourage certain
tactics that may be used in proxy fights. However, such provisions could have
the effect of discouraging others from making tender offers for L-3
Communications Holdings' shares and, as a consequence, they also may inhibit
fluctuations in the market price of L-3 Communications Holdings' shares that
could result from actual or rumored takeover attempts. Such provisions also may
have the effect of preventing changes in L-3 Communications Holdings'
management.



SECTION 203 OF THE DELAWARE GENERAL CORPORATION LAW


     L-3 Communications Holdings, as a Delaware corporation, is subject to
Section 203 of the Delaware General Corporation Law, which, subject to certain
exceptions, prohibits it from engaging in any business combination with any
interested stockholder for a period of three years following the time that such
stockholder became an interested stockholder, unless:

     o   prior to such time, the board of directors of L-3 Communications
         Holdings approved either the business combination or the transaction
         that resulted in the stockholder becoming an interested holder;

     o   upon consummation of the transaction that resulted in the stockholder
         becoming an interested stockholder, the interested stockholder owned at
         least 85.0% of the outstanding voting stock of L-3 Communications
         Holdings at the time the transaction commenced, excluding for purposes
         of determining the number of shares outstanding those shares owned (a)
         by persons who are directors and also officers and (b) by employee
         stock plans in which employee participants do not have the right to
         determine confidentially whether shares held subject to the plan will
         be tendered in a tender or exchange offer; or

     o   at or subsequent to such time, the business combination is approved by
         the board of directors of L-3 Communications Holdings and authorized at
         an annual or special meeting of stockholders, and not by written
         consent, by the affirmative vote of at least 66 2/3% of the outstanding
         voting stock of L-3 Communications Holdings that is not owned by the
         interested stockholder.



                                       23


     In general, Section 203 defines "business combination" to include the
   following:


     o   any merger or consolidation involving the interested stockholder and
         L-3 Communications Holdings;


     o   any sale, transfer, pledge or other disposition of 10% or more of
         assets involving the interested stockholder;


     o   subject to certain exceptions, any transaction that results in the
         issuance or transfer of any of L-3 Communications Holdings' stock to
         the interested stockholder;

     o   any transaction involving L-3 Communications Holdings that has the
         effect of increasing the proportionate share of the stock or any class
         or series of L-3 Communications Holdings' stock beneficially owned by
         the interested stockholder; or

     o   the receipt by the interested stockholder of the benefit of any loans,
         advances, guarantees, pledges or other financial benefits by or through
         L-3 Communications Holdings.

     In general, Section 203 defines "interested stockholder" as an entity or
person beneficially owning 15% or more of the outstanding voting stock of L-3
Communications Holdings and any entity or person affiliated with or controlling
or controlled by such entity or person.


        DESCRIPTION OF STOCK PURCHASE CONTRACTS AND STOCK PURCHASE UNITS


     L-3 Communications Holdings may issue stock purchase contracts representing
contracts obligating holders to purchase from L-3 Communications Holdings and
obligating L-3 Communications Holdings to sell to the holders a specified number
of shares of common stock or preferred stock at a future date or dates. The
price per share of common stock or preferred stock may be fixed at the time the
stock purchase contracts are issued or may be determined by reference to a
specific formula set forth in the stock purchase contracts.


     The stock purchase contracts may be issued separately or as a part of
units, often known as stock purchase units, consisting of a stock purchase
contract and either of the following:


     o   Debt securities of L-3 Communications Holdings, or


     o   Debt obligations of third parties, including U.S. Treasury securities,


securing the holder's obligations to purchase the common stock or preferred
stock under the stock purchase contracts. The stock purchase contracts may
require L-3 Communications Holdings to make periodic payments to the holders of
the stock purchase units or vice versa, and such payments may be unsecured or
prefunded on some basis. The stock purchase contracts may require holders to
secure their obligations in a specified manner and in certain circumstances L-3
Communications Holdings may deliver newly issued prepaid stock purchase
contracts, often known as prepaid securities, upon release to a holder of any
collateral securing each holder's obligations under the original stock purchase
contract.

     The applicable prospectus supplement will describe the terms of any stock
purchase contracts or stock purchase units and, if applicable, prepaid
securities. The description in the prospectus supplement will not contain all of
the information that you may find useful. For more information, you should
review the stock purchase contracts, the collateral arrangements and depositary
arrangements, if applicable, relating to such stock purchase contracts or stock
purchase units and, if applicable, the prepaid securities and the document
pursuant to which the prepaid securities will be issued, which will be filed
with the Securities and Exchange Commission promptly after the offering of such
stock purchase contracts or stock purchase units and, if applicable, prepaid
securities.



                             DESCRIPTION OF WARRANTS


     L-3 Communications Holdings may issue warrants for the purchase of debt
securities, preferred stock or common stock of L-3 Communications Holdings. L-3
Communications Holdings may issue



                                       24



warrants independently or together with other securities. Each series of
warrants will be issued under a separate warrant agreement to be entered into
between L-3 Communications Holdings and a bank or trust company, as warrant
agent. You should refer to the warrant agreement relating to the specific
warrants being offered for the complete terms of the warrant agreement and the
warrants.


     Each warrant will entitle the holder to purchase the principal amount of
debt securities of L-3 Communications Holdings, or the number of shares of
preferred stock or common stock of L-3 Communications Holdings at the exercise
price set forth in, or calculable as set forth in, the prospectus supplement.
The exercise price may be subject to adjustment upon the occurrence of certain
events, as set forth in the prospectus supplement. After the close of business
on the expiration date of the warrant, unexercised warrants will become void.
The place or places where, and the manner in which, warrants may be exercised
shall be specified in the prospectus supplement.


     The applicable prospectus supplement will describe the following terms,
where applicable, of the warrants in respect of which this prospectus is being
delivered:


     o   the title of the warrants;

     o   the aggregate number of the warrants;

     o   the price or prices at which the warrants will be issued;

     o   the designation, aggregate principal amount and terms of the securities
         purchasable upon exercise of the warrants;

     o   the designation and terms of the securities with which the warrants are
         issued and the number of the warrants issued with each such security;

     o   if applicable, the date on and after which the warrants and the related
         securities will be separately transferable;

     o   the price at which the securities purchasable upon exercise of the
         warrants may be purchased;

     o   the date on which the right to exercise the warrants will commence and
         the date on which the right will expire;

     o   the minimum or maximum amount of the warrants that may be exercised at
         any one time;



     o   information with respect to book-entry procedures, if any;



     o   a discussion of certain United States federal income tax
         considerations; and




     o   any other terms of the warrants, including terms, procedures and
         limitations relating to the exercise of the warrants.



                              SELLING STOCKHOLDERS



     The table below presents certain information regarding the beneficial
ownership of the common stock of L-3 Communications Holdings outstanding as of
May 1, 2002 by Frank C. Lanza, our Chairman, Chief Executive Officer and
Director, and Robert V. LaPenta, our President, Chief Financial Officer and
Director.









                                                                          NUMBER OF SHARES OF
                                                                                COMMON
                                                                        STOCK BENEFICIALLY OWNED
                                                                               AFTER THE
                                                                        SALE OF MAXIMUM NUMBER
                             SHARES OF COMMON STOCK   MAXIMUM NUMBER OF           OF
                               BENEFICIALLY OWNED     SHARES OF COMMON  SHARES OF COMMON STOCK
                            ------------------------  STOCK TO BE SOLD  -----------------------
NAME OF BENEFICIAL OWNER       NUMBER    PERCENTAGE       HEREUNDER        NUMBER    PERCENTAGE
- --------------------------- ----------- ------------ ------------------ ----------- -----------
                                                                     
Frank C. Lanza ............  4,779,914      5.9%         500,000           4,279,914    5.3%
Robert V. LaPenta .........  5,135,198      6.3%         500,000           4,635,198    5.7%









                                       25


                              PLAN OF DISTRIBUTION


     L-3 Communications Holdings, L-3 Communications Corporation and the selling
stockholders may sell the securities offered by this prospectus through
underwriters, dealers or agents or directly to one or more purchasers including
through a dividend reinvestment program. The applicable prospectus supplement
will list the names of any underwriters or agents involved in the sale of the
offered securities and any applicable commissions or discounts. In addition, the
applicable prospectus supplement will list any securities exchanges on which the
offered securities may be listed.

     If underwriters are used in the sale, the offered securities will be
acquired by the underwriters for their own account. The underwriters may resell
the offered securities in one or more transactions, including negotiated
transactions, at a fixed public offering price or at varying prices determined
at the time of sale. The offered securities may be offered through an
underwriting syndicate represented by many underwriters. The obligations of the
underwriters to purchase the offered securities will be subject to certain
conditions. The underwriters will be obligated to purchase all the offered
securities if any are purchased. Any initial public offering price and any
discounts or concessions allowed or reallowed or paid to dealers may be changed
from time to time.

     The offered securities may be sold directly by L-3 Communications Holdings,
L-3 Communications Corporation and the selling stockholders or through agents.
Any agent will be named, and any commissions payable to that agent will be set
forth in the prospectus supplement. Unless otherwise indicated in the prospectus
supplement, any agent will be acting on a best efforts basis.

     L-3 Communications Holdings, L-3 Communications Corporation and the selling
stockholders may authorize agents, underwriters or dealers to solicit offers by
specified institutions to purchase securities offered by this prospectus
pursuant to delayed delivery contracts providing for payment and delivery on a
specified date in the future. These contracts will be subject only to those
conditions set forth in the prospectus supplement. The prospectus supplement
will set forth the commission payable for soliciting such contracts.


     L-3 Communications Holdings, L-3 Communications Corporation and the selling
stockholders may agree to indemnify underwriters, dealers or agents against
certain civil liabilities, including liabilities under the Securities Act of
1933, and may also agree to contribute to payments which the underwriters,
dealers or agents may be required to make.



                                  LEGAL MATTERS

     The validity of each of the securities offered by this prospectus will be
passed upon for us by Simpson Thacher & Bartlett, New York, New York.


                                     EXPERTS

     The following financial statements have been incorporated by reference in
this registration statement in reliance of the reports of PricewaterhouseCoopers
LLP, independent accountants, given on their authority as experts in accounting
and auditing:

     o   Our consolidated financial statements as of December 31, 2001 and 2000
         and for the three years ended December 31, 2001 incorporated by
         reference in this registration statement from our Annual Report on Form
         10-K for the year ended December 31, 2001; and

     o   The combined financial statements of Aircraft Integration Systems
         Business as of December 31, 2001 and 2000 and for the three years ended
         December 31, 2001 incorporated by reference in this registration
         statement from our Current Report on Form 8-K dated March 22, 2002.


                              AVAILABLE INFORMATION

     We are subject to the informational requirements of the Securities Exchange
Act of 1934 and, in accordance therewith, file reports and other information
with the SEC. Such reports and other


                                       26


information can be inspected and copied at the Public Reference Section of the
SEC located at Room 1024, Judiciary Plaza, 450 Fifth Street, N.W., Washington
D.C. 20549 and at a regional public reference facility maintained by the SEC
located at Citicorp Center, 500 West Madison Street, Suite 1400, Chicago,
Illinois 60661. Copies of such material can be obtained from the Public
Reference Section of the SEC at prescribed rates. Such material may also be
accessed electronically by means of the SEC's home page on the Internet
(http://www.sec.gov).


     So long as we are subject to the periodic reporting requirements of the
Securities Exchange Act, we are required to furnish the information required to
be filed with the SEC to the trustee and the holders of the notes. We have
agreed that, even if we are not required under the Securities Exchange Act to
furnish such information to the SEC, we will nonetheless continue to furnish
information that would be required to be furnished by us by Section 13 of the
Securities Exchange Act to the trustee and the holders of the notes as if it
were subject to such periodic reporting requirements.


                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE


     The SEC allows us to "incorporate by reference" the information contained
in documents that we file with them, which means that we can disclose important
information to you by referring you to those documents. The information
incorporated by reference is considered to be part of this prospectus.
Information in this prospectus supersedes information incorporated by reference
that we filed with the SEC prior to the date of this prospectus, while
information that we file later with the SEC will automatically update and
supersede this information. We incorporate by reference the documents listed
below and any future filings we will make with the SEC under Sections 13(a),
13(c), 14 or 15(d) of the Securities Exchange Act of 1934:



     o   Our Annual Report on Form 10-K for the fiscal year ended December 31,
         2001;

     o   Our Current Report on Form 8-K dated March 22, 2002; and

     o   Our Current Report on Form 8-K dated April 24, 2002.



     You can request a copy of these filings at no cost, by writing or calling
us at the following address:


          L-3 Communications Holdings, Inc.
          600 Third Avenue
          New York, New York 10016
          (212) 697-1111
          Attention: Corporate Secretary.


     YOU SHOULD ONLY RELY ON THE INFORMATION INCORPORATED BY REFERENCE OR
PROVIDED IN THIS PROSPECTUS OR ANY SUPPLEMENT TO THIS PROSPECTUS. WE HAVE NOT
AUTHORIZED ANYONE ELSE TO PROVIDE YOU WITH DIFFERENT INFORMATION. WE ARE NOT
MAKING AN OFFER OF THESE SECURITIES IN ANY STATE WHERE THE OFFER IS NOT
PERMITTED. YOU SHOULD NOT ASSUME THAT THE INFORMATION IN THIS PROSPECTUS OR ANY
SUPPLEMENT TO THIS PROSPECTUS IS ACCURATE AS OF ANY DATE OTHER THAN THE DATE ON
THE FRONT OF THOSE DOCUMENTS. YOU SHOULD READ ALL INFORMATION SUPPLEMENTING THIS
PROSPECTUS.




                                       27


                PART II INFORMATION NOT REQUIRED IN PROSPECTUS


ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

     The following is an itemization of all fees and expenses, other than
underwriting discounts and commissions, incurred or expected to be incurred by
L-3 Communications Holdings, Inc. in connection with the issuance and
distribution of the securities being registered hereby. All but the Securities
and Exchange Commission registration fee are estimates and remain subject to
future contingencies.




                                                             
Securities and Exchange Commission registration fee .........    $ 97,118
Legal fees and expenses .....................................     250,000
Accounting fees and expenses ................................     100,000
Trustees' fees and expenses .................................       2,500
Printing and engraving fees .................................     100,000
Miscellaneous expenses ......................................      50,000
                                                                 --------
   Total ....................................................    $599,618
                                                                 ========


ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS

     Section 145 of the Delaware General Corporation Law (the "DGCL") provides
for, among other things:

     (i)   permissive indemnification for expenses (including attorneys' fees),
           judgments, fines and amounts paid in settlement actually and
           reasonably incurred by designated persons, including directors and
           officers of a corporation, in the event such persons are parties to
           litigation other than stockholder derivative actions if certain
           conditions are met;

     (ii)  permissive indemnification for expenses (including attorneys' fees)
           actually and reasonably incurred by designated persons, including
           directors and officers of a corporation, in the event such persons
           are parties to stockholder derivative actions if certain conditions
           are met;

     (iii) mandatory indemnification for expenses (including attorneys' fees)
           actually and reasonably incurred by designated persons, including
           directors and officers of a corporation, in the event such persons
           are successful on the merits or otherwise in defense of litigation
           covered by (i) and (ii) above; and

     (iv)  that the indemnification provided for by Section 145 is not deemed
           exclusive of any other rights which may be provided under any by-law,
           agreement, stockholder or disinterested director vote, or otherwise.

     In addition to the indemnification provisions of the DGCL described above,
our Certificate of Incorporation (the "Certificate of Incorporation") provides
that we shall, to the fullest extent permitted by the DGCL, (i) indemnify our
officers and directors and (ii) advance expenses incurred by such officers or
directors in relation to any action, suit or proceeding.

     Our Bylaws (the "Bylaws") require the advancement of expenses to an officer
or director (without a determination as to his conduct) in advance of the final
disposition of a proceeding if such person furnishes a written affirmation of
his good faith belief that he has met the applicable standard of conduct and
furnishes a written undertaking to repay any advances if it is ultimately
determined that he is not entitled to indemnification. In connection with
proceedings by or in the right of the Registrant, the Bylaws provide that
indemnification shall include not only reasonable expenses, but also judgments,
fines, penalties and amounts paid in settlement. The Bylaws provide that the
Registrant may, subject to authorization on a case by case basis, indemnify and
advance expenses to employees or agents to the same extent as a director or to a
lesser extent (or greater, as permitted by law) as determined by the board of
directors.

     The Bylaws purport to confer upon officers and directors contractual rights
to indemnification and advancement of expenses as provided therein.


                                      II-1


     Our Certificate of Incorporation limits the personal liability of our
directors to us or our stockholders for monetary damages for breach of the
fiduciary duty as a director, other than liability as a director (i) for breach
of duty of loyalty to us or our stockholders, (ii) for acts or omissions not in
good faith or which involve intentional misconduct or a knowing violation of
law, (iii) under Section 174 of the DGCL (certain illegal distributions) or (iv)
for any transaction for which the director derived an improper personal benefit.


     We maintain officers' and directors' insurance covering certain liabilities
that may be incurred by officers and directors in the performance of their
duties.

     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors, officers or persons controlling the
registrant pursuant to the foregoing provisions, the registrants have been
informed that in the opinion of the Securities and Exchange Commission such
indemnification is against public policy as expressed in the Act and is
therefore unenforceable.


ITEM 16. EXHIBITS

     The following exhibits are filed as part of this registration statement:






 EXHIBIT
   NO.   DESCRIPTION
  ----   -----------
      
  1.1    Form of Debt Underwriting Agreement*
  1.2    Form of Equity Underwriting Agreement*
  1.3    Form of Preferred Stock Underwriting Agreement*
  1.4    Form of Warrants Underwriting Agreement*
  1.5    Form of Stock Purchase Units Underwriting Agreement*
  1.6    Form of Stock Purchase Contracts Underwriting Agreement*
  4.1    Certificate of Incorporation (incorporated herein by reference to
         Exhibit 3.1 of L-3 Communications Holdings, Inc.'s Registration
         Statement on Form S-1, as filed with the Commission on February 27,
         1998 (File No. 333-46975))
  4.2    By-laws (incorporated herein by reference to Exhibit 3.2 of L-3
         Communications Holdings, Inc.'s Registration Statement on Form S-1, as
         filed with the Commission on February 27, 1998 (File No. 333-46975))
  4.3    Form of stock certificate (incorporated herein by reference to Exhibit
         4.1 of L-3 Communications Holdings, Inc.'s Registration Statement on
         Form S-1 (File No. 333-46975))
  4.4    Stockholders Agreement dated as of April 30, 1997 among L-3
         Communications Holdings, Inc. and the stockholders parties thereto
         (incorporated by reference to Exhibit 10.3 to L-3 Communications
         Holdings, Inc.'s Registration Statement on Form S-1 No. 333-46975)
  4.5    Form of L-3 Communications Holdings Indenture**
  4.6    Form of L-3 Communications Corporation Indenture**
  4.7    Form of L-3 Communications Holdings Debt Security*
  4.8    Form of L-3 Communications Corporation Debt Security*
  4.9    Form of Guarantee under Holdings Indenture*
  4.10   Form of Guarantee under Communications Indenture*
  4.11   Form of preferred stock share certificate.*
  4.12   Form of Purchase Contract Agreement relating to stock purchase contracts and stock purchase units*
  4.13   Form of Pledge Agreement for stock purchase contracts and stock purchase units.*
  4.14   Form of Warrant Agreement*
  5.1    Opinion of Simpson Thacher & Bartlett**
  12     Statements re: Computation of Ratios***
 23.1    Consent of PricewaterhouseCoopers LLP***
 23.2    Consent of Simpson Thacher & Bartlett (contained in their opinion filed as Exhibit 5.1)
  24     Power of Attorney of L-3 Communications Holdings, Inc., L-3 Communications Corporation and the Additional Registrants
         (included on the signature pages to the initial registration statement)
  25.1   Statement of Eligibility of Trustee on Form T-1 under the Holdings Indenture**
  25.2   Statement of Eligibility of Trustee on Form T-1 under the Communications Indenture**



- ----------
*     To be filed with a subsequent 8-K

**    Filed with the initial registration statement
***   Filed herewith



                                      II-2


ITEM 17. UNDERTAKINGS

(a)        The undersigned registrant hereby undertakes:

   (1)   To file, during any period in which offers or sales are being made, a
         post-effective amendment to this registration statement:

       (i)        To include any prospectus required by Section 10(a)(3) of the
                  Securities Act;

       (ii)       To reflect in the prospectus any facts or events arising
                  after the effective date of the Registration Statement (or
                  the most recent post-effective amendment thereof) which,
                  individually or in the aggregate, represent a fundamental
                  change in the information set forth in the Registration
                  Statement. Notwithstanding the foregoing, any increase or
                  decrease in volume of securities offered (if the total dollar
                  value of securities offered would not exceed that which was
                  registered) and any deviation from the low or high end of the
                  estimated maximum offering range may be reflected in the form
                  of prospectus filed with the Commission pursuant to Rule
                  424(b) if, in the aggregate, the changes in volume and price
                  represent no more that a 20 percent change in the maximum
                  aggregate offering price set forth in the "Calculation of
                  Registration Fee" table in the effective Registration
                  Statement; and

       (iii)      To include any material information with respect to the plan
                  of distribution not previously disclosed in the Registration
                  Statement or any material change to such information in the
                  Registration Statement.

   (2)   That, for the purpose of determining any liability under the Securities
         Act, each such post-effective amendment shall be deemed to be a new
         registration statement relating to the securities offered therein, and
         the offering of such securities at that time shall be deemed to be the
         initial bona fide offering thereof.

   (3)   To remove from registration by means of a post-effective amendment any
         of the securities being registered which remain unsold at the
         termination of the offering.

(b)        Insofar as indemnification for liabilities arising under the
           Securities Act may be permitted to directors, officers and
           controlling persons of the registrant pursuant to the foregoing
           provisions, or otherwise, the registrant has been advised that in
           the opinion of the Commission such indemnification is against public
           policy as expressed in the Securities Act, and is, therefore,
           unenforceable. In the event that a claim for indemnification against
           such liabilities (other than the payment by a registrant of expenses
           incurred or paid by a director, officer or controlling person of
           such registrant in the successful defense of any action, suit or
           proceeding) is asserted by such director, officer or controlling
           person in connection with the securities being registered, the
           registrant will, unless in the opinion of its counsel the matter has
           been settled by controlling precedent, submit to a court of
           appropriate jurisdiction the question whether such indemnification
           by it is against public policy as expressed in the Securities Act
           and will be governed by the final adjudication of such issue.

(c)        The undersigned registrant hereby undertakes that, for purposes of
           determining any liability under the Act, each filing of the
           registrant's Annual Report on Form 10-K pursuant to section 13(a) or
           section 15(d) of the Securities Exchange Act of 1934 (and, where
           applicable, each filing of an employee benefit plan's annual report
           pursuant to section 15(d) of the Securities Exchange Act of 1934)
           that is incorporated by reference in the registration statement
           shall be deemed to be a new registration statement relating to the
           securities offered therein, and the offering of such securities at
           that time shall be deemed to be the initial bona fide offering
           thereof.

(d)        The undersigned registrant hereby undertakes to file an application
           for the purpose of determining the eligibility of the trustee to act
           under Subsection (a) of Section 310 of the Trust Indenture Act in
           accordance with the rules and regulations prescribed by the
           Commission under Section 305(b)(2) of the Trust Indenture Act.


                                      II-3




                                   SIGNATURES


     Pursuant to the requirements of the Securities Act of 1933, the registrant
certifies that is has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-3 and duly caused this Amendment No.1 to the
Registration Statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the city of New York, state of New York, on May 3, 2002.



                                        L-3 COMMUNICATIONS HOLDINGS, INC.

                                        By: /s/ Christopher C. Cambria
                                          ------------------------------------

                                        Christopher C. Cambria, Senior Vice
                                        President --
                                        General Counsel and Secretary


     Pursuant to the requirements of the Securities Act of 1933, this Amendment
No.1 to the Registration Statement has been signed by the following persons in
the capacities and on the dates indicated.






         SIGNATURE                             TITLE                        DATE
- --------------------------   ----------------------------------------   ------------
                                                                  
             *               Chairman, Chief Executive Officer and      May 3, 2002
 -----------------------
     Frank C. Lanza          Director

             *               President, Chief Financial Officer and     May 3, 2002
 -----------------------
     Robert V. LaPenta              Director

             *               Senior Vice President -- Finance           May 3, 2002
 -----------------------
    Michael T. Strianese

             *               Director                                   May 3, 2002
 -----------------------
     Thomas A. Corcoran

             *               Director                                   May 3, 2002
 -----------------------
     Robert B. Millard

             *               Director                                   May 3, 2002
 -----------------------
     John E. Montague

             *               Director                                   May 3, 2002
 -----------------------
   John M. Shalikashvili

             *               Director                                   May 3, 2002
 -----------------------
      Arthur L. Simon

             *               Director                                   May 3, 2002
 -----------------------
    Alan H. Washkowitz




* By: /s/ Christopher C. Cambria
  ------------------------------
  Christopher C. Cambria
     Attorney-In-Fact



                                      II-4


                                   SIGNATURES



     Pursuant to the requirements of the Securities Act of 1933, the registrant
certifies that it has reasonable grounds to believe that it meets all of the
requirements for filing on Form S-3 and duly caused this Amendment No.1 to the
Registration Statement to be signed on its behalf by the undersigned, thereunto
duly authorized, in the city of New York, state of New York, on May 3, 2002.



                                        L-3 COMMUNICATIONS CORPORATION



                                        By:  /s/ Christopher C. Cambria
                                          ------------------------------------
                                        Christopher C. Cambria, Senior Vice
                                        President --
                                        General Counsel and Secretary


     Pursuant to the requirements of the Securities Act of 1933, this Amendment
No.1 to the Registration Statement has been signed by the following persons in
the capacities and on the dates indicated.








        SIGNATURE                             TITLE                        DATE
- -------------------------   ----------------------------------------   ------------
                                                                 
             *              Chairman, Chief Executive Officer and      May 3, 2002
- -----------------------
                            Director
      Frank C. Lanza

             *              President, Chief Financial Officer and     May 3, 2002
- -----------------------
                            Director
    Robert V. LaPenta

             *              Senior Vice President -- Finance           May 3, 2002
- -----------------------
  Michael T. Strianese

             *              Director                                   May 3, 2002
- -----------------------
   Thomas A. Corcoran

             *              Director                                   May 3, 2002
- -----------------------
   Robert B. Millard

             *              Director                                   May 3, 2002
- -----------------------
    John E. Montague

             *              Director                                   May 3, 2002
- -----------------------
 John M. Shalikashvili

             *              Director                                   May 3, 2002
- -----------------------
    Arthur L. Simon

             *              Director                                   May 3, 2002
- -----------------------
  Alan H. Washkowitz




* By: /s/ Christopher C. Cambria
  ------------------------------
  Christopher C. Cambria
    Attorney-In-Fact


                                      II-5


                                   SIGNATURES



     Pursuant to the requirements of the Securities Act of 1933, each of the
registrants certifies that it has reasonable grounds to believe that it meets
all of the requirements for filing on Form S-3 and duly caused this Amendment
No.1 to the Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the city of New York, state of New
York, on May 3, 2002.




                                        ELECTRODYNAMICS, INC.
                                        L-3 COMMUNICATIONS DBS MICROWAVE, INC.
                                        L-3 COMMUNICATIONS STORM CONTROL
                                         SYSTEMS, INC.
                                        MICRODYNE CORPORATION



                                        By:  /s/ Christopher C. Cambria
                                          ------------------------------------

                                        Christopher C. Cambria, Vice President
                                        and Secretary


     Pursuant to the requirements of the Securities Act of 1933, this Amendment
No.1 to the Registration Statement has been signed by the following persons in
the capacities and on the dates indicated.








           SIGNATURE                               TITLE                        DATE
- ------------------------------   ----------------------------------------   ------------
                                                                      
               *                 Chief Executive Officer and Director       May 3, 2002
 -----------------------
       Frank C. Lanza

               *                 Chief Financial Officer and Director       May 3, 2002
 -----------------------
     Robert V. LaPenta

 /s/ Christopher C. Cambria      Vice President, Secretary and Director     May 3, 2002
 --------------------------
     Christopher C. Cambria




*  By: /s/ Christopher C. Cambria
   ------------------------------
   Christopher C. Cambria
     Attorney-In-Fact



                                      II-6


                                   SIGNATURES



     Pursuant to the requirements of the Securities Act of 1933, each of the
registrants certifies that it has reasonable grounds to believe that it meets
all of the requirements for filing on Form S-3 and duly caused this Amendment
No.1 to the Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the city of New York, state of New
York, on May 3, 2002.





                                     AMI INSTRUMENTS, INC.
                                     APCOM, INC.
                                     CELERITY SYSTEMS INCORPORATED
                                     COLEMAN RESEARCH CORPORATION
                                     EER SYSTEMS, INC.
                                     HENSCHEL INC.
                                     HYGIENETICS ENVIRONMENTAL
                                      SERVICES, INC.
                                     INTERSTATE ELECTRONICS CORPORATION
                                     KDI PRECISION PRODUCTS, INC.
                                     L-3 COMMUNICATIONS AIS GP CORPORATION
                                     L-3 COMMUNICATIONS ANALYTICS CORPORATION
                                     L-3 COMMUNICATIONS ATLANTIC SCIENCE AND
                                      TECHNOLOGY CORPORATION
                                     L-3 COMMUNICATIONS AYDIN CORPORATION
                                     L-3 COMMUNICATIONS ESSCO, INC.
                                     L-3 COMMUNICATIONS ILEX SYSTEMS, INC.
                                     L-3 COMMUNICATIONS INVESTMENTS, INC.
                                     L-3 COMMUNICATIONS SPD
                                      TECHNOLOGIES, INC.
                                     MICRODYNE COMMUNICATIONS  TECHNOLOGIES
                                     INCORPORATED
                                     MICRODYNE OUTSOURCING INCORPORATED
                                     MPRI, INC.
                                     PAC ORD INC.
                                     POWER PARAGON, INC.
                                     SPD ELECTRICAL SYSTEMS, INC.
                                     SPD HOLDINGS, INC.
                                     SPD SWITCHGEAR INC.
                                     SOUTHERN CALIFORNIA MICROWAVE, INC.



                                     By:  /s/ Christopher C. Cambria
                                       --------------------------------------
                                     Christopher C. Cambria, Vice President
                                     and Secretary



                                      II-7



     Pursuant to the requirements of the Securities Act of 1933, this Amendment
No.1 to the Registration Statement has been signed by the following persons in
the capacities and on the dates indicated.








           SIGNATURE                         TITLE                   DATE
- ------------------------------   -----------------------------   ------------
                                                           
               *                 Chief Executive Officer         May 3, 2002
 -----------------------
       Frank C. Lanza

               *                 Chief Financial Officer         May 3, 2002
 -----------------------
     Robert V. LaPenta

  /s/ Christopher C. Cambria     Vice President and Director     May 3, 2002
 ---------------------------
     Christopher C. Cambria




* By: /s/ Christopher C. Cambria
  ------------------------------
  Christopher C. Cambria
     Attorney-In-Fact



                                      II-8


                                   SIGNATURES



     Pursuant to the requirements of the Securities Act of 1933, each of the
registrants certifies that it has reasonable grounds to believe that it meets
all of the requirements for filing on Form S-3 and duly caused this Amendment
No.1 to the Registration Statement to be signed on its behalf by the
undersigned, thereunto duly authorized, in the city of New York, state of New
York, on May 3, 2002.



                                 L-3 COMMUNICATIONS INTEGRATED SYSTEMS L.P.


                                 By: L-3 COMMUNICATIONS AIS GP CORPORATION,
                                 as General Partner



                                 By:  /s/ Christopher C. Cambria
                                   ------------------------------------------
                                 Name: Christopher C. Cambria
                                 Title: Vice President and Secretary


     Pursuant to the requirements of the Securities Act of 1933, this Amendment
No.1 to the Registration Statement has been signed by the following persons in
the capacities and on the dates indicated.








           SIGNATURE                         TITLE                   DATE
- ------------------------------   -----------------------------   ------------
                                                           
               *                 Chief Executive Officer         May 3, 2002
 -----------------------
       Frank C. Lanza

               *                 Chief Financial Officer         May 3, 2002
 -----------------------
     Robert V. LaPenta

  /s/ Christopher C. Cambria     Vice President and Director     May 3, 2002
 ---------------------------
     Christopher C. Cambria




*  By: /s/ Christopher C. Cambria
   ------------------------------
   Christopher C. Cambria
     Attorney-In-Fact


                                      II-9


                                INDEX TO EXHIBITS





 EXHIBIT
   NO.     DESCRIPTION
 ------    -----------
        
  1.1      Form of Debt Underwriting Agreement*
  1.2      Form of Equity Underwriting Agreement*
  1.3      Form of Preferred Stock Underwriting Agreement*
  1.4      Form of Warrants Underwriting Agreement*
  1.5      Form of Stock Purchase Units Underwriting Agreement*
  1.6      Form of Stock Purchase Contracts Underwriting Agreement*
  4.1      Certificate of Incorporation (incorporated herein by reference to Exhibit 3.1 of L-3 Communications Holdings, Inc.'s
           Registration Statement on Form S-1, as filed with the Commission on February 27, 1998 (File No. 333-46975))
  4.2      By-laws (incorporated herein by reference to Exhibit 3.2 of L-3 Communications Holdings, Inc.'s Registration Statement on
           Form S-1, as filed with the Commission on February 27, 1998 (File No. 333-46975))
  4.3      Form of stock certificate (incorporated herein by reference to Exhibit 4.1 of L-3 Communications Holdings, Inc.'s
           Registration Statement on Form S-1 (File No. 333-46975))
  4.4      Stockholders Agreement dated as of April 30, 1997 among L-3 Communications Holdings, Inc. and the stockholders parties
           thereto (incorporated by reference to Exhibit 10.3 to L-3 Communications Holdings, Inc.'s Registration Statement on Form
           S-1 No. 333-46975)
  4.5      Form of L-3 Communications Holdings Indenture**
  4.6      Form of L-3 Communications Corporation Indenture**
  4.7      Form of L-3 Communications Holdings Debt Security*
  4.8      Form of L-3 Communications Corporation Debt Security*
  4.9      Form of Guarantee under Holdings Indenture*
  4.10     Form of Guarantee under Communications Indenture*
  4.11     Form of Preferred Stock share certificate*
  4.12     Form of Purchase Contract Agreement relating to stock purchase contracts and stock purchase units*
  4.13     Form of Pledge Agreement for stock purchase contracts and stock purchase units*
  4.14     Form of Warrant Agreement*
  5.1      Opinion of Simpson Thacher & Bartlett**
  12       Statements re: Computation of Ratios***
  23.1     Consent of PricewaterhouseCoopers LLP***
  23.2     Consent of Simpson Thacher & Bartlett (contained in their opinion filed as Exhibit 5.1)
  24       Power of Attorney of L-3 Communications Holdings, Inc., L-3 Communications Corporation and the Additional Registrants
           (included on the signature pages to the initial registration statement)
  25.1     Statement of Eligibility of Trustee on Form T-1 under the Holdings Indenture**
  25.2     Statement of Eligibility of Trustee on Form T-1 under the Communications Indenture**



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*     To be filed with a subsequent 8-K


**    Filed with the initial registration statement

***   Filed herewith