EXHIBIT 3.4

                              AMENDED AND RESTATED

                                     BY-LAWS

                                       OF

                           AEROMIL ENGINEERING COMPANY

                                      ****


                           INCORPORATED UNDER THE LAWS
                                     OF THE
                                STATE OF DELAWARE
                                       ON

                                NOVEMBER 3, 1997

                                      ****


                                   LAW OFFICES
                                       OF
                           MORGAN, LEWIS & BOCKIUS LLP
                             300 SOUTH GRAND AVENUE
                                   22ND FLOOR
                       LOS ANGELES, CALIFORNIA 90071-3132


                                       -1-



                              AMENDED AND RESTATED

                                     BYLAWS

                                       OF

                           AEROMIL ENGINEERING COMPANY


                                    ARTICLE I
                                  STOCKHOLDERS

          SECTION 1. ANNUAL MEETING. The annual meeting of the stockholders of
the Corporation shall be held on such date, at such time and at such place
within or without the State of Delaware as may be designated by the Board of
Directors, for the purpose of electing Directors and for the transaction of such
other business as may be properly brought before the meeting.

          SECTION 2. SPECIAL MEETINGS. Except as otherwise provided in the
Certificate of Incorporation, a special meeting of the stockholders of the
Corporation may be called at any time by the Board of Directors, the Chairman of
the Board or the President. Any special meeting of the stockholders shall be
held on such date, at such time and at such place within or without the State of
Delaware as the Board of Directors or the officer calling the meeting may
designate. At a special meeting of the stockholders, no business shall be
transacted and no corporate action shall be taken other than that stated in the
notice of the meeting unless all of the stockholders are present in person or by
proxy, in which case any and all business may be transacted at the meeting even
though the meeting is held without notice.

          SECTION 3. NOTICE OF MEETINGS. Except as otherwise provided in these
Bylaws or by law, a written notice of each meeting of the stockholders shall be
given not less than ten (10) nor more than sixty (60) days before the date of
the meeting to each stockholder of the Corporation entitled to vote at such
meeting at his address as it appears on the records of the Corporation. The
notice shall state the place, date and hour of the meeting and, in the case of a
special meeting, the purpose or purposes for which the meeting is called.

          SECTION 4. QUORUM. At any meeting of the stockholders, the holders of
a majority in number of the total outstanding shares of stock of the Corporation
entitled to vote at such meeting, present in person or represented by proxy,
shall constitute a quorum of the stockholders for all purposes, unless the
representation of a larger number of shares shall be required by law, by the
Certificate of Incorporation or by these Bylaws, in which case the
representation of the number of shares so required shall constitute a quorum;
provided that at any meeting of the stockholders at which the holders of any
class of stock of the Corporation shall be entitled to vote


                                       -2-



separately as a class, the holders of a majority in number of the total
outstanding shares of such class, present in person or represented by proxy,
shall constitute a quorum for purposes of such class vote unless the
representation of a larger number of shares of such class shall be required by
law, by the Certificate of Incorporation or by these Bylaws.

          SECTION 5. ADJOURNED MEETINGS. Whether or not a quorum shall be
present in person or represented at any meeting of the stockholders, the holders
of a majority in number of the shares of stock of the Corporation present in
person or represented by proxy and entitled to vote at such meeting may adjourn
from time to time; provided, however, that if the holders of any class of stock
of the Corporation are entitled to vote separately as a class upon any matter at
such meeting, any adjournment of the meeting in respect of action by such class
upon such matter shall be determined by the holders of a majority of the shares
of such class present in person or represented by proxy and entitled to vote at
such meeting. When a meeting is adjourned to another time or place, notice need
not be given of the adjourned meeting if the time and place thereof are
announced at the meeting at which the adjournment is taken. At the adjourned
meeting the stockholders, or the holders of any class of stock entitled to vote
separately as a class, as the case may be, may transact any business which might
have been transacted by them at the original meeting. If the adjournment is for
more than thirty days, or if after the adjournment a new record date is fixed
for the adjourned meeting, a notice of the adjourned meeting shall be given to
each stockholder of record entitled to vote at the adjourned meeting.

          SECTION 6. ORGANIZATION. The Chairman of the Board or, in the absence
of the Chairman of the Board, the President shall call all meetings of the
stockholders to order, and shall act as Chairman of such meetings. In the
absence of the Chairman of the Board and the President, the holders of a
majority in number of the shares of stock of the Corporation present in person
or represented by proxy and entitled to vote at such meeting shall elect a
Chairman.

          The Secretary of the Corporation shall act as Secretary of all
meetings of the stockholders; but in the absence of the Secretary, the Chairman
may appoint any person to act as Secretary of the meeting. It shall be the duty
of the Secretary to prepare and make, at least ten days before every meeting of
stockholders, a complete list of stockholders entitled to vote at such meeting,
arranged in alphabetical order and showing the address of each stockholder and
the number of shares registered in the name of each stockholder. Such list shall
be open, either at a place within the city where the meeting is to be held,
which place shall be specified in the notice of the meeting or, if not so
specified, at the place where the meeting is to be held, for the ten days next
preceding the meeting, to the examination of any stockholder, for any purpose
germane to the meeting, during ordinary business hours, and shall be produced
and kept at the time and place of the meeting during the whole time thereof and
subject to the inspection of any stockholder who may be present.

          SECTION 7. VOTING. Except as otherwise provided in the Certificate of
Incorporation or by law, each stockholder shall be entitled to one vote for each
share of the capital stock of the


                                       -3-



Corporation registered in the name of such stockholder upon the books of the
Corporation. Each stockholder entitled to vote at a meeting of stockholders or
to express consent or dissent to corporate action in writing without a meeting
may authorize another person or persons to act for him or her by proxy, but no
such proxy shall be voted or acted upon after three years from its date, unless
the proxy provides for a longer period. When directed by the presiding officer
or upon the demand of any stockholder, the vote upon any matter before a meeting
of stockholders shall be by ballot. Except as otherwise provided by law or by
the Certificate of Incorporation, Directors shall be elected by a plurality of
the votes cast at a meeting of stockholders by the stockholders entitled to vote
in the election and, whenever any corporate action, other than the election of
Directors is to be taken, it shall be authorized by a majority of the votes cast
at a meeting of stockholders by the stockholders entitled to vote thereon.

          Shares of the capital stock of the Corporation belonging to the
Corporation or to another corporation, if a majority of the shares entitled to
vote in the election of directors of such other corporation is held, directly or
indirectly, by the Corporation, shall neither be entitled to vote nor be counted
for quorum purposes.

          SECTION 8. INSPECTORS. When required by law or directed by the
presiding officer or upon the demand of any stockholder entitled to vote, but
not otherwise, the polls shall be opened and closed, the proxies and ballots
shall be received and taken in charge, and all questions touching the
qualification of voters, the validity of proxies and the acceptance or rejection
of votes shall be decided at any meeting of the stockholders by two or more
Inspectors who may be appointed by the Board of Directors before the meeting, or
if not so appointed, shall be appointed by the presiding officer at the meeting.
If any person so appointed fails to appear or act, the vacancy may be filled by
appointment in like manner.

          SECTION 9. CONSENT OF STOCKHOLDERS IN LIEU OF MEETING. Unless
otherwise provided in the Certificate of Incorporation, any action required to
be taken or which may be taken at any annual or special meeting of the
stockholders of the Corporation, may be taken without a meeting, without prior
notice and without a vote, if a consent in writing, setting forth the action so
taken, shall be signed by the holders of outstanding stock having not less than
the minimum number of votes that would be necessary to authorize or take such
action at a meeting at which all shares entitled to vote thereon were present
and voted. Prompt notice of the taking of any such corporate action without a
meeting by less than unanimous written consent shall be given to those
stockholders who have not consented in writing.

                                   ARTICLE II
                               BOARD OF DIRECTORS

          SECTION 1. NUMBER AND TERM OF OFFICE. The business and affairs of the
Corporation shall be managed by or under the direction of a Board of Directors,
none of whom need be stockholders of the Corporation. The number of Directors
constituting the Board of Directors shall be fixed from time to time by
resolution passed by a majority of the Board of


                                       -4-



Directors. The Directors shall, except as hereinafter otherwise provided for
filling vacancies, be elected at the annual meeting of stockholders, and shall
hold office until their respective successors are elected and qualified or until
their earlier resignation or removal.

          SECTION 2. REMOVAL, VACANCIES AND ADDITIONAL DIRECTORS. The
stockholders may, at any special meeting the notice of which shall state that it
is called for that purpose, remove, with or without cause, any Director and fill
the vacancy; provided that whenever any Director shall have been elected by the
holders of any class of stock of the Corporation voting separately as a class
under the provisions of the Certificate of Incorporation, such Director may be
removed and the vacancy filled only by the holders of that class of stock voting
separately as a class. Vacancies caused by any such removal and not filled by
the stockholders at the meeting at which such removal shall have been made, or
any vacancy caused by the death or resignation of any Director or for any other
reason, and any newly created directorship resulting from any increase in the
authorized number of Directors, may be filled by the affirmative vote of a
majority of the Directors then in office, although less than a quorum, and any
Director so elected to fill any such vacancy or newly created directorship shall
hold office until his successor is elected and qualified or until his earlier
resignation or removal.

          When one or more Directors shall resign effective at a future date, a
majority of the Directors then in office, including those who have so resigned,
shall have power to fill such vacancy or vacancies, the vote thereon to take
effect when such resignation or resignations shall become effective, and each
Director so chosen shall hold office as herein provided in connection with the
filling of other vacancies.

          SECTION 3. PLACE OF MEETING. The Board of Directors may hold its
meetings in such place or places in the State of Delaware or outside the state
of Delaware as the Board from time to time shall determine.

          SECTION 4. REGULAR MEETINGS. Regular meetings of the Board of
Directors shall be held at such times and places as the Board from time to time
by resolution shall determine. No notice shall be required for any regular
meeting of the Board of Directors; but a copy of every resolution fixing or
changing the time or place of regular meetings shall be mailed to every Director
at least five days before the first meeting held in pursuance thereof.

          SECTION 5. SPECIAL MEETINGS. Special meetings of the Board of
Directors shall be held whenever called by direction of the Chairman of the
Board, the President or by any two of the Directors then in office.

          Notice of the day, hour and place of holding of each special meeting
shall be given by mailing the same at least two days before the meeting or by
causing the same to be transmitted by facsimile, telegram or telephone at least
one day before the meeting to each Director. Unless otherwise indicated in the
notice thereof, any and all business other than an amendment of these Bylaws may
be transacted at any special meeting, and an amendment of these Bylaws may be


                                       -5-



acted upon if the notice of the meeting shall have stated that the amendment of
these Bylaws is one of the purposes of the meeting. At any meeting at which
every Director shall be present, even though without any notice, any business
may be transacted, including the amendment of these Bylaws.

          SECTION 6. QUORUM. Subject to the provisions of Section 2 of this
Article II, a majority of the members of the Board of Directors in office (but,
unless the Board shall consist solely of one Director, in no case less than
one-third of the total number of Directors nor less than two Directors) shall
constitute a quorum for the transaction of business and the vote of the majority
of the Directors present at any meeting of the Board of Directors at which a
quorum is present shall be the act of the Board of Directors. If at any meeting
of the Board there is less than a quorum present, a majority of those present
may adjourn the meeting from time to time.

          SECTION 7. ORGANIZATION. The Chairman of the Board or, in the absence
of the Chairman of the Board, the President shall preside at all meetings of the
Board of Directors. In the absence of the Chairman of the Board and the
President, a Chairman shall be elected from the Directors present. The Secretary
of the Corporation shall act as Secretary of all meetings of the Directors; but
in the absence of the Secretary, the Chairman may appoint any person to act as
Secretary of the meeting.

          SECTION 8. COMMITTEES. The Board of Directors may designate one or
more committees, each committee to consist of one or more of the Directors of
the Corporation. The Board may designate one or more Directors as alternate
members of any committee, who may replace any absent or disqualified member at
any meeting of the committee. In the absence or disqualification of a member of
a committee, the member or members thereof present at any meeting and not
disqualified from voting, whether or not such member or members constitute a
quorum, may unanimously appoint another member of the Board of Directors to act
at the meeting in the place of any such absent or disqualified member. Any such
committee, to the extent provided in the resolution of the Board, shall have and
may exercise all the powers and authority of the Board of Directors in the
management of the business and the affairs of the Corporation, and may authorize
the seal of the Corporation to be affixed to all papers which may require it;
but no such committee shall have the power or authority in reference to
approving or adopting; or recommending to the stockholders, any action or matter
expressly required by law to be submitted to stockholders for approval, or
adopting, amending or repealing these Bylaws.

          SECTION 9. CONFERENCE TELEPHONE MEETINGS. Unless otherwise restricted
by the Certificate of Incorporation or by these Bylaws, the members of the Board
of Directors or any committee designated by the Board, may participate in a
meeting of the Board or such committee, as the case may be, by means of
conference telephone or similar communications equipment by means of which all
persons participating in the meeting can hear each other, and such participation
shall constitute presence in person at such meeting.


                                       -6-



          SECTION 10. CONSENT OF DIRECTORS OR COMMITTEE IN LIEU OF MEETING.
Unless otherwise restricted by the Certificate of Incorporation or by these
Bylaws, any action required or permitted to be taken at any meeting of the Board
of Directors, or of any committee thereof, may be taken without a meeting if all
members of the Board or committee, as the case may be, consent thereto in
writing and the writing or writings are filed with the minutes of proceedings of
the Board or committee, as the case may be.

                                   ARTICLE III
                                    OFFICERS


          SECTION 1. OFFICERS. The officers of the Corporation shall be a
Chairman of the Board, a President, one or more Vice Presidents, a Secretary and
a Treasurer, and such additional officers, if any, as shall be elected by the
Board of Directors pursuant to the provisions of Section 8 of this Article III.
The Chairman of the Board, the President, one or more Vice Presidents, the
Secretary and the Treasurer shall be elected by the Board of Directors at its
first meeting after each annual meeting of the stockholders. The failure to hold
such election shall not of itself terminate the term of office of any officer.
All officers shall hold office at the pleasure of the Board of Directors. Any
officer may resign at any time upon written notice to the Corporation. Officers
may, but need not, be Directors. Any number of offices may be held by the same
person.

          All officers, agents and employees shall be subject to removal, with
or without cause, at any time by the Board of Directors. The removal of an
officer without cause shall be without prejudice to his contract rights, if any.
The election or appointment of an officer shall not of itself create contract
rights. All agents and employees other than officers elected by the Board of
Directors shall also be subject to removal, with or without cause, at any time
by the officers appointing them.

          Any vacancy caused by the death, resignation or removal of any
officer, or otherwise, may be filled by the Board of Directors, and any officer
so elected shall hold office at the pleasure of the Board of Directors.

          In addition to the powers and duties of the officers of the
Corporation as set forth in these Bylaws, the officers shall have such authority
and shall perform such duties as from time to time may be determined by the
Board of Directors.

          SECTION 2. POWERS AND DUTIES OF THE CHAIRMAN OF THE BOARD. The
Chairman of the Board, subject to the control of the Board of Directors, shall
have general charge and control of all its business and affairs and shall have
all powers and shall perform all duties incident to the office of Chairman of
the Board. The Chairman shall preside at all meetings of the stockholders and at
all meetings of the Board of Directors and shall have such other powers and
perform such other duties as may from time to time be assigned by these Bylaws
or by the Board of Directors.


                                       -7-



          SECTION 3. POWERS AND DUTIES OF THE PRESIDENT. The President, subject
to the control of the Board of Directors and the Chairman of the Board, shall
have general charge and control of all its operations and shall have all powers
and shall perform all duties incident to the office of President. In the absence
of the Chairman of the Board, the President shall preside at all meetings of the
stockholders and at all meetings of the Board of Directors and shall have such
other powers and perform such other duties as may from time to time be assigned
by these Bylaws or by the Board of Directors or the Chairman of the Board.

          SECTION 4. POWERS AND DUTIES OF THE VICE PRESIDENTS. Each Vice
President shall have all powers and shall perform all duties incident to the
office of Vice President and shall have such other powers and perform such other
duties as may from time to time be assigned by these Bylaws or by the Board of
Directors, the Chairman of the Board or the President.

          SECTION 5. POWERS AND DUTIES OF THE SECRETARY. The Secretary shall
keep the minutes of all meetings of the Board of Directors and the minutes of
all meetings of the stockholders in books provided for that purpose. The
Secretary shall attend to the giving or serving of all notices of the
Corporation; shall have custody of the corporate seal of the Corporation and
shall affix the same to such documents and other papers as the Board of
Directors or the President shall authorize and direct; shall have charge of the
stock certificate books, transfer books and stock ledgers and such other books
and papers as the Board of Directors or the President shall direct, all of which
shall at all reasonable times be open to the examination of any Director, upon
application, at the office of the Corporation during business hours; and
whenever required by the Board of Directors or the President shall render
statements of such accounts. The Secretary shall have all powers and shall
perform all duties incident to the office of Secretary and shall also have such
other powers and shall perform such other duties as may from time to time be
assigned by these Bylaws or by the Board of Directors, the Chairman of the Board
or the President.

          SECTION 6. POWERS AND DUTIES OF THE TREASURER. The Treasurer shall
have custody of, and when proper shall pay out, disburse or otherwise dispose
of, all funds and securities of the Corporation. The Treasurer may endorse on
behalf of the Corporation for collection checks, notes and other obligations and
shall deposit the same to the credit of the Corporation in such bank or banks or
depositary or depositaries as the Board of Directors may designate; shall sign
all receipts and vouchers for payments made to the Corporation; shall enter or
cause to be entered regularly in the books of the Corporation kept for the
purpose full and accurate accounts of all moneys received or paid or otherwise
disposed of and whenever required by the Board of Directors or the President
shall render statements of such accounts. The Treasurer shall, at all reasonable
times, exhibit the books and accounts to any Director of the Corporation upon
application at the office of the Corporation during business hours; and shall
have all powers and shall perform all duties incident to the office of Treasurer
and shall also have such other powers and shall perform such other duties as may
from time to time be assigned by these Bylaws or by the Board of Directors, the
Chairman of the Board or the President.


                                       -8-



          SECTION 7. ADDITIONAL OFFICERS. The Board of Directors may from time
to time elect such other officers (who may but need not be Directors), including
a Controller, Assistant Treasurers, Assistant Secretaries and Assistant
Controllers, as the Board may deem advisable and such officers shall have such
authority and shall perform such duties as may from time to time be assigned by
the Board of Directors, the Chairman of the Board or the President.

          The Board of Directors may from time to time by resolution delegate to
any Assistant Treasurer or Assistant Treasurers any of the powers or duties
herein assigned to the Treasurer; and may similarly delegate to any Assistant
Secretary or Assistant Secretaries any of the powers or duties herein assigned
to the Secretary.

          SECTION 8. GIVING OF BOND BY OFFICERS. All officers of the
Corporation, if required to do so by the Board of Directors, shall furnish bonds
to the Corporation for the faithful performance of their duties, in such amounts
and with such conditions and security as the Board shall require.

          SECTION 9. VOTING UPON STOCKS. Unless otherwise ordered by the Board
of Directors, the Chairman of the Board, the President or any Vice President
shall have full power and authority on behalf of the Corporation to attend and
to act and to vote, or in the name of the Corporation to execute proxies to
vote, at any meeting of stockholders of any corporation in which the Corporation
may hold stock, and at any such meeting shall possess and may exercise, in
person or by proxy, any and all rights, powers and privileges incident to the
ownership of such stock. The Board of Directors may from time to time, by
resolution, confer like powers upon any other person or persons.

          SECTION 10. COMPENSATION OF OFFICERS. The officers of the Corporation
shall be entitled to receive such compensation for their services as shall from
time to time be determined by the Board of Directors.

                                   ARTICLE IV
                    INDEMNIFICATION OF DIRECTORS AND OFFICERS


          Section 1. NATURE OF INDEMNITY. The Corporation shall indemnify any
person who was or is a party or is threatened to be made a party to any
threatened, pending or completed action, suit or proceeding, whether civil,
criminal, administrative or investigative, by reason of the fact that he or she
is or was or has agreed to become a Director or officer of the Corporation, or
is or was serving or has agreed to serve at the request of the Corporation as a
Director or officer of another corporation, partnership, joint venture, trust or
other enterprise, or by reason of any action alleged to have been taken or
omitted in such capacity, and may indemnify any person who was or is a party or
is threatened to be made a party to such an action, suit or proceeding by reason
of the fact that he or she is or was or has agreed to become an employee or
agent of the Corporation, or is or was serving or has agreed to serve at the
request of the Corporation as an employee or agent of another corporation,
partnership, joint venture, trust or other enterprise,


                                       -9-



against expenses (including attorneys' fees), judgments, fines and amounts paid
in settlement actually and reasonably incurred by such person or on his or her
behalf in connection with such action, suit or proceeding and any appeal
therefrom, if the person acted in good faith and in a manner he or she
reasonably believed to be in or not opposed to the best interests of the
Corporation, and, with respect to any criminal action or proceeding, had no
reasonable cause to believe his or her conduct was unlawful; except that in the
case of an action or suit by or in the right of the Corporation to procure a
judgment in its favor (1) such indemnification shall be limited to expenses
(including attorneys' fees) actually and reasonably incurred by such person in
the defense or settlement of such action or suit, and (2) no indemnification
shall be made in respect of any claim, issue or matter as to which such person
shall have been adjudged to be liable to the Corporation unless and only to the
extent that the Delaware Court of Chancery or the court in which such action or
suit was brought shall determine upon application that, despite the adjudication
of liability but in view of all the circumstances of the case, such person is
fairly and reasonably entitled to indemnity for such expenses which the Delaware
Court of Chancery or such other court shall deem proper.

          The termination of any action, suit or proceeding by judgment, order,
settlement, conviction, or upon a plea of nolo contendere or its equivalent,
shall not, of itself, create a presumption that the person did not act in good
faith and in a manner which he or she reasonably believed to be in or not
opposed to the best interests of the Corporation, and, with respect to any
criminal action or proceeding, had reasonable cause to believe that his or her
conduct was unlawful.

          Section 2. SUCCESSFUL DEFENSE. To the extent that a Director, officer,
employee or agent of the Corporation has been successful on the merits or
otherwise in defense of any action, suit or proceeding referred to in Section 1
of this Article IV or in defense of any claim, issue or matter therein, he or
she shall be indemnified against expenses (including attorneys' fees) actually
and reasonably incurred by him or her in connection therewith.

          Section 3. DETERMINATION THAT INDEMNIFICATION IS PROPER. Any
indemnification of a Director or officer of the Corporation under Section 1 of
this Article IV (unless ordered by a court) shall be made by the Corporation
unless a determination is made that indemnification of the Director or officer
is not proper in the circumstances because he or she has not met the applicable
standard of conduct set forth in Section 1. Any indemnification of an employee
or agent of the Corporation under Section 1 (unless ordered by a court) may be
made by the Corporation upon a determination that indemnification of the
employee or agent is proper in the circumstances because he or she has met the
applicable standard of conduct set forth in Section 1. Any such determination
shall be made (1) by a majority vote of the Directors who are not parties to
such action, suit or proceeding, even though less than a quorum, or (2) if there
are no such directors, or if such directors so direct, by independent legal
counsel in a written opinion, or (3) by the stockholders.


                                      -10-



          Section 4. ADVANCE PAYMENT OF EXPENSES. Unless the Board of Directors
otherwise determines in a specific case, expenses incurred by a Director or
officer in defending a civil or criminal action, suit or proceeding shall be
paid by the Corporation in advance of the final disposition of such action, suit
or proceeding upon receipt of an undertaking by or on behalf of the Director or
officer to repay such amount if it shall ultimately be determined that he or she
is not entitled to be indemnified by the Corporation as authorized in this
Article IV. Such expenses incurred by other employees and agents may be so paid
upon such terms and conditions, if any, as the Board of Directors deems
appropriate. The Board of Directors may authorize the Corporation's legal
counsel to represent such Director, officer, employee or agent in any action,
suit or proceeding, whether or not the Corporation is a party to such action,
suit or proceeding.

          Section 5. SURVIVAL; PRESERVATION OF OTHER RIGHTS. The foregoing
indemnification provisions shall be deemed to be a contract between the
Corporation and each Director, officer, employee and agent who serves in any
such capacity at any time while these provisions as well as the relevant
provisions of the Delaware General Corporation Law are in effect and any repeal
or modification thereof shall not affect any right or obligation then existing
with respect to any state of facts then or previously existing or any action,
suit, or proceeding previously or thereafter brought or threatened based in
whole or in part upon any such state of facts. Such a contract right may not be
modified retroactively without the consent of such Director, officer, employee
or agent.

          The indemnification provided by this Article IV shall not be deemed
exclusive of any other rights to which a person indemnified may be entitled
under any Bylaw, agreement, vote of stockholders or disinterested Directors or
otherwise, both as to action in his or her official capacity and as to action in
another capacity while holding such office, and shall continue as to a person
who has ceased to be a Director, officer, employee or agent and shall inure to
the benefit of the heirs, executors and administrators of such a person. The
Corporation may enter into an agreement with any of its Directors, officers,
employees or agents providing for indemnification and advancement of expenses,
including attorneys fees, that may change, enhance, qualify or limit any right
to indemnification or advancement of expenses created by this Article IV.

          Section 6. SEVERABILITY. If this Article IV or any portion hereof
shall be invalidated on any ground by any court of competent jurisdiction, then
the Corporation shall nevertheless indemnify each Director or officer and may
indemnify each employee or agent of the Corporation as to costs, charges and
expenses (including attorneys' fees), judgment, fines and amounts paid in
settlement with respect to any action, suit or proceeding, whether civil,
criminal, administrative or investigative, including an action by or in the
right of the Corporation, to the fullest extent permitted by any applicable
portion of this Article IV that shall not have been invalidated and to the
fullest extent permitted by applicable law.

          Section 7. SUBROGATION. In the event of payment of indemnification to
a person described in Section 1 of this Article IV, the Corporation shall be
subrogated to the extent of such payment to any right of recovery such person
may have and such person, as a condition of


                                      -11-



receiving indemnification from the Corporation, shall execute all documents and
do all things that the Corporation may deem necessary or desirable to perfect
such right of recovery, including the execution of such documents necessary to
enable the Corporation effectively to enforce any such recovery.

          Section 8. NO DUPLICATION OF PAYMENTS. The Corporation shall not be
liable under this Article IV to make any payment in connection with any claim
made against a person described in Section 1 of this Article IV to the extent
such person has otherwise received payment (under any insurance policy, bylaw or
otherwise) of the amounts otherwise payable as indemnity hereunder.

                                    ARTICLE V
                             STOCK-SEAL-FISCAL YEAR

          SECTION 1. CERTIFICATES FOR SHARES OF STOCK. The certificates for
shares of stock of the Corporation shall be in such form, not inconsistent with
the Certificate of Incorporation, as shall be approved by the Board of
Directors. All certificates shall be signed by the Chairman of the Board, the
President or a Vice President and by the Secretary or an Assistant Secretary or
the Treasurer or an Assistant Treasurer, and shall not be valid unless so
signed.

          In case any officer or officers who shall have signed any such
certificate or certificates shall cease to be such officer or officers of the
Corporation, whether because of death, resignation or otherwise, before such
certificate or certificates shall have been delivered by the Corporation, such
certificate or certificates may nevertheless be issued and delivered as though
the person or persons who signed such certificate or certificates had not ceased
to be such officer or officers of the Corporation.

          All certificates for shares of stock shall be consecutively numbered
as the same are issued. The name of the person owning the shares represented
thereby with the number of such shares and the date of issue thereof shall be
entered on the books of the Corporation.

          Except as hereinafter provided, all certificates surrendered to the
Corporation for transfer shall be canceled, and no new certificates shall be
issued until former certificates for the same number of shares have been
surrendered and canceled.

          SECTION 2. LOST, STOLEN OR DESTROYED CERTIFICATES. Whenever a person
owning a certificate for shares of stock of the Corporation alleges that it has
been lost, stolen or destroyed, he or she shall file in the office of the
Corporation an affidavit setting forth, to the best of his or her knowledge and
belief, the time, place and circumstances of the loss, theft or destruction,
and, if required by the Board of Directors, a bond of indemnity or other
indemnification sufficient in the opinion of the Board of Directors to indemnify
the Corporation and its agents against any claim that may be made against it or
them on account of the alleged loss, theft or destruction of any such
certificate or the issuance of a new certificate in replacement therefor.
Thereupon the


                                      -12-



Corporation may cause to be issued to such person a new certificate in
replacement for the certificate alleged to have been lost, stolen or destroyed.
Upon the stub of every new certificate so issued shall be noted the fact of such
issue and the number, date and the name of the registered owner of the lost,
stolen or destroyed certificate in lieu of which the new certificate is issued.

          SECTION 3. TRANSFER OF SHARES. Shares of stock of the Corporation
shall be transferred on the books of the Corporation by the holder thereof, in
person or by his attorney duly authorized in writing, upon surrender and
cancellation of certificates for the number of shares of stock to be
transferred, except as provided in Section 2 of this Article IV.

          SECTION 4. REGULATIONS. The Board of Directors shall have power and
authority to make such rules and regulations as it may deem expedient concerning
the issue, transfer and registration of certificates for shares of stock of the
Corporation.

          SECTION 5. RECORD DATE. In order that the Corporation may determine
the stockholders entitled to notice of or to vote at any meeting of stockholders
or any adjournment thereof, or to express consent to corporate action in writing
without a meeting or to receive payment of any dividend or other distribution or
allotment of any rights, or to exercise any rights in respect of any change,
conversion or exchange of stock or for the purpose of any other lawful action,
as the case may be, the Board of Directors may fix, in advance, a record date,
which shall not be (i) more than sixty (60) nor less than ten (10) days before
the date of such meeting, or (ii) in the case of corporate action to be taken by
consent in writing without a meeting, prior to, or more than ten (10) days
after, the date upon which the resolution fixing the record date is adopted by
the Board of Directors, or (iii) more than sixty (60) days prior to any other
action.

          If no record date is fixed, the record date for determining
stockholders entitled to notice of or to vote at a meeting of stockholders shall
be at the close of business on the day next preceding the day on which notice is
given or, if notice is waived, at the close of business on the day next
preceding the day on which the meeting is held; the record date for determining
stockholders entitled to express consent to corporate action in writing without
a meeting, when no prior action by the Board of Directors is necessary, shall be
the day on which the first written consent is delivered to the Corporation; and
the record date for determining stockholders for any other purpose shall be at
the close of business on the day on which the Board of Directors adopts the
resolution relating thereto. A determination of stockholders of record entitled
to notice of or to vote at a meeting of stockholders shall apply to any
adjournment of the meeting; provided, however, that the Board of Directors may
fix a new record date for the adjourned meeting.

          SECTION 6. DIVIDENDS. Subject to the provisions of the Certificate of
Incorporation, the Board of Directors shall have power to declare and pay
dividends upon shares of stock of the Corporation, but only out of funds
available for the payment of dividends as provided by law.

          Subject to the provisions of the Certificate of Incorporation, any
dividends declared upon the stock of the Corporation shall be payable on such
date or dates as the Board of


                                      -13-



Directors shall determine. If the date fixed for the payment of any dividend
shall in any year fall upon a legal holiday, then the dividend payable on such
date shall be paid on the next day not a legal holiday.

          SECTION 7. CORPORATE SEAL. The Board of Directors shall provide a
suitable seal, containing the name of the Corporation, which seal shall be kept
in the custody of the Secretary. A duplicate of the seal may be kept and be used
by any officer of the Corporation designated by the Board of Directors, the
Chairman of the Board or the President.

          SECTION 8. FISCAL YEAR. The fiscal year of the Corporation shall be
such fiscal year as the Board of Directors from time to time by resolution shall
determine.

                                   ARTICLE VI
                            MISCELLANEOUS PROVISIONS

          SECTION 1. CHECKS, NOTES, ETC. All checks, drafts, bills of exchange,
acceptances, notes or other obligations or orders for the payment of money shall
be signed and, if so required by the Board of Directors, countersigned by such
officers of the Corporation and/or other persons as the Board of Directors from
time to time shall designate.

          Checks, drafts, bills of exchange, acceptances, notes, obligations and
orders for the payment of money made payable to the Corporation may be endorsed
for deposit to the credit of the Corporation with a duly authorized depository
by the Treasurer and/or such other officers or persons as the Board of Directors
from time to time may designate.

          SECTION 2. LOANS. No loans and no renewals of any loans shall be
contracted on behalf of the Corporation except as authorized by the Board of
Directors. When authorized so to do, any officer or agent of the Corporation may
effect loans and advances for the Corporation from any bank, trust company or
other institution or from any firm, corporation or individual, and for such
loans and advances may make, execute and deliver promissory notes, bonds or
other evidences of indebtedness of the Corporation. When authorized so to do,
any officer or agent of the Corporation may pledge, hypothecate or transfer, as
security for the payment of any and all loans, advances, indebtedness and
liabilities of the Corporation, any and all stocks, securities and other
personal property at any time held by the Corporation, and to that end may
endorse, assign and deliver the same. Such authority may be general or confined
to specific instances.

          Section 3. CONTRACTS. Except as otherwise provided in these Bylaws or
by law or as otherwise directed by the Board of Directors, the Chairman of the
Board, the President or any Vice President shall be authorized to execute and
deliver, in the name and on behalf of the Corporation, all agreements, bonds,
contracts, deeds, mortgages, and other instruments, either for the Corporation's
own account or in a fiduciary or other capacity, and the seal of the
Corporation, if appropriate, shall be affixed thereto by any of such officers or
the Secretary or an Assistant Secretary. The Board of Directors, the Chairman of
the Board, the President or any Vice


                                      -14-



President designated by the Board of Directors, the Chairman of the Board or the
President may authorize any other officer, employee or agent to execute and
deliver, in the name and on behalf of the Corporation, agreements, bonds,
contracts, deeds, mortgages, and other instruments, either for the Corporation's
own account or in a fiduciary or other capacity, and, if appropriate, to affix
the seal of the Corporation thereto. The grant of such authority by the Board or
any such officer may be general or confined to specific instances.

          SECTION 4. WAIVERS OF NOTICE. Whenever any notice whatever is required
to be given by law, by the Certificate of Incorporation or by these Bylaws to
any person or persons, a waiver thereof in writing, signed by the person or
persons entitled to the notice, whether before or after the time stated therein,
shall be deemed equivalent thereto.

          SECTION 5. OFFICES OUTSIDE OF DELAWARE. Except as otherwise required
by the laws of the State of Delaware, the Corporation may have an office or
offices and keep its books, documents and papers outside of the State of
Delaware at such place or places as from time to time may be determined by the
Board of Directors or the Chairman of the Board.

                                   ARTICLE VII
                                   AMENDMENTS

          These Bylaws and any amendment thereof may be altered, amended or
repealed, or new Bylaws may be adopted, by the Board of Directors at any regular
or special meeting by the affirmative vote of a majority of all of the members
of the Board, provided in the case of any special meeting at which all of the
members of the Board are not present, that the notice of such meeting shall have
stated that the amendment of these Bylaws was one of the purposes of the
meeting; but these Bylaws and any amendment thereof, may be altered, amended or
repealed or new Bylaws may be adopted by the holders of a majority of the total
outstanding stock of the Corporation entitled to vote at any annual meeting or
at any special meeting, provided, in the case of any special meeting, that
notice of such proposed alteration, amendment, repeal or adoption is included in
the notice of the meeting.


                                      -15-



                             CERTIFICATE OF ADOPTION
                                       OF
                          AMENDED AND RESTATED BY-LAWS
                                       OF
                           AEROMIL ENGINEERING COMPANY




          This is to certify:

          That I am the duly elected, qualified and acting Secretary of AEROMIL
ENGINEERING COMPANY (the "Corporation") and the attached amended and restated
by-laws were adopted as the by-laws of the Corporation on April 30, 1999 by the
Unanimous Written Consent of the Board of Directors of the Corporation.

          Dated effective the 30th day of April, 1999.



                                              /s/  Douglas B. Solomon
                                              -----------------------------
                                              Douglas B. Solomon, Secretary



(Seal)


                                      -16-