EXHIBIT 10.40A(1)



CONFIDENTIAL PORTIONS HAVE BEEN OMITTED AND FILED SEPARATELY
  WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A
               CONFIDENTIAL TREATMENT REQUEST.

                    CONTRACT CHANGE ORDER

PURCHASER:                Atlantic Coast Airlines

PURCHASE AGREEMENT NO.:   P.A.-0350  AIRCRAFT TYPE:CRJ-200

C.C.O. NO.:               13         DATED: 28/04/99

PAGES AFFECTED:           N/A        Page 1 of 2

____________________________________________________________
_________________________

  1.0 REASON FOR CHANGE - Agreed Change

      2.0DESCRIPTION OF CHANGE - To amend the Purchase Agreement with  the
      incorporation of the Letter Agreement No. 0350-25 for  the change in
      delivery month of the -----------Aircraft from-----------------------.

  3.0 PRICE - Not Applicable

  4.0 PAYMENT - Not Applicable

  5.0 CUSTOMER SERVICES - Not Applicable

  6.0 TECHNICAL MATTERS - Not Applicable

  7.0 OTHER -

      7.1  Letter Agreement No. 0372-25 attached hereto is
      hereby created and made a part of the Agreement.
 ALL OTHER TERMS AND CONDITIONS OF THE AGREEMENT WILL REMAIN
                          UNCHANGED

For administrative purposes only, a consolidation of the
amendments contained in this CCO is attached.  In the event
of inconsistencies between the attached pages and this CCO,
this CCO shall prevail.
____________________________________________________________
_________________________

FOR AND ON BEHALF OF:                   FOR AND ON BEHALF
OF:

Bombardier Inc.                         Atlantic Coast
Airlines

Signed:  _______________________________
Signed:_____________________


Date:  ___28/04/98__                    Date:
__28/04/99_

April 28, 1999
Our Ref: B99-7701-MD-RJ0350-025


Atlantic Coast Airlines
1 Export Drive,
Dulles, Virginia,
U.S.A. 20166



Letter Agreement No. 025 to Purchase Agreement No. RJ-0350
dated January 8, 1997 (the "Agreement" between Bombardier
Inc. ("BRAD") and Atlantic Coast Airlines ("Buyer") relating
to the purchase of forty-three (43) Canadair Regional Jet
Aircraft (the "Aircraft")


Subject:  Change in Delivery Month



Gentlemen:

This letter constitutes an integral part of the Agreement
and evidences our further agreement with the matter set
forth below.  All terms used herein and in the Agreement and
not defined herein, shall have the same meaning as in the
Agreement.


1.   Bombardier has requested that Buyer start the  delivery
     and acceptance process of the ---------- Aircraft -----
     -----   on   --------------,  with  the   closing   and
     execution of the interim lease agreement ACL-332 on ---
     -----------.  -----------------------------------------
     ----,  Bombardier will issue to Buyer a credit memo  in
     the amount of -----------------------------------------
     ------------------------------------------   upon   the
     execution  of  such lease agreement for the  ----------
     Aircraft.





2.   The provisions of this Letter Agreement are personal to
     Buyer  and shall not be assigned or otherwise  disposed
     of  by  Buyer  without  the prior  written  consent  of
     Bombardier.

3.   This  Letter Agreement constitutes an integral part  of
     the   Agreement  and  is  subject  to  the  terms   and
     conditions  contained therein.  To the  extent  of  any
     inconsistency or conflict between this Letter Agreement
     and the Agreement, this Letter Agreement shall prevail.



Yours truly,
BOMBARDIER INC.



________________________                Date:_____________
Name:     Marianella de la Barrera
Title:         Account Executive, Contracts
Bombardier Regional Aircraft Division



Acknowledged and Accepted:

this________day of April, 1999


ATLANTIC COAST AIRLINES



________________________                Date:_____________
Name:
Title:
Atlantic Coast Airlines

                           CONTRACT CHANGE ORDER


PURCHASER:                ATLANTIC COAST AIRLINES

PURCHASE AGREEMENT NO.:   CRJ-0350                  AIRCRAFT TYPE: CRJ

C.C.O. NO.:               14                        DATED: July 29, 1999

PAGES AFFECTED:           See below                 PAGE 1 of 38



REASON FOR CHANGE

1.   To amend the Purchase Agreement to (i) give effect to the exercise by
     Buyer of 17 Option Aircraft and thereby increase the order to 60 Firm
     Aircraft, (ii) to provide Buyer with interim aircraft in the event of
     a delay in delivery of those Aircraft scheduled to deliver in the-----
     ------ (iii) to introduce a new Maintenance Cost Guarantee Letter
     Agreement to reflect the current order of 60 Aircraft and to include
     within the Letter Agreement the 3 CRJ aircraft purchased by Buyer
     pursuant to purchase agreement PA-0454, (iv) to revise the Completion
     Rate Guarantee Letter Agreement and the Operational Restrictions
     Letter Agreement to include the CRJ aircraft purchased by Buyer
     pursuant to purchase agreement PA-0454, and (v) to give Buyer the
     conditional right to assign its right to purchase and lease up to
     seventeen (17) Aircraft to a new corporation to be formed in the
     United States.


   PAGES TO BE SUBSTITUTED         NEW/REVISED PAGES

   Purchase Agreement pages no. 56 & 56A   Attachment 1 to CCO #14 dated
   July 29, 1999
   Purchase Agreement page no. C-1 Attachment 2 to CCO #14 dated July 29,
   1999
   Letter Agreement No. 006 page no. 2     Attachment 3 to CCO #14 dated
   July 29, 1999
   Letter Agreement No. 008A                   Attachment 4 to CCO #14
   dated July 29, 1999
   Letter Agreement No. 009C                   Attachment 5 to CCO #14
   dated July 29, 1999
   Letter Agreement No. 026        Attachment 6 to CCO #14 dated July 29,
   1999
   Letter Agreement No. 027        Attachment 7 to CCO #14 dated July 29,
   1999


DESCRIPTION OF CHANGE:

P.A. and all Letter Agreements
   All references to forty-three (43) Aircraft are hereby changed to refer
   to sixty (60) Aircraft.

P.A. Pages 56 & 56A - DELIVERY SCHEDULE
   The delivery schedule is amended to add Aircraft forty-four (44)
   through sixty (60).

P.A. Page C-1 - FSR  TERM
   The term for the FSR is amended from ----------------------------------
   -----------------------, due to the exercise of the seventeen (17)
   Option Aircraft.
Letter Agreement No. 003B - (OPTION AIRCRAFT)
   Letter Agreement No. 003B is no longer applicable and is hereby
   canceled

Letter Agreement No. 006 - (OPERATIONAL RESTRICTIONS)
   Letter Agreement is revised to include the CRJ aircraft to be delivered
   under purchase agreement PA-0454 between Buyer and Bombardier.


Letter Agreement No. 008A (SCHEDULE COMPLETION RATE)
   Letter Agreement No. 008 is hereby deleted and replaced with Letter
   Agreement No. 008A to
    include the CRJ aircraft to be delivered under purchase agreement PA-
   0454 between Buyer and Bombardier.

Letter Agreement No. 009C (AIRFRAME DIRECT MAINTENANCE COST)
   Letter Agreement No. 009B is hereby deleted and replaced with Letter
   Agreement No. 009C to
   incorporate changes to reflect a new guarantee value for the Airframe
   Direct Maintenance Cost Guarantee ("ADMCG") which takes into account
   Buyer's current order of sixty (60) Aircraft, and to include under the
   Letter Agreement CRJ aircraft to be delivered to Buyer pursuant to
   purchase agreement PA-0454 between Bombardier and Buyer.
   The guarantee value shall be ------------------------------------------
   -----------------------------------------------------------------------
   --------
Letter Agreement No. 026 - INTERIM AIRCRAFT
   Letter Agreement No. 026 is introduced to provide Buyer with interim
   CRJ aircraft for lease in the event Bombardier requires these to meet
   the year 2000 aircraft deliveries.

Letter Agreement No. 027 - ASSIGNMENT
   Letter Agreement No. 027 is introduced to provide Bombardier's
   conditional consent to Buyer with respect to Buyer's request to assign
   its right to purchase and to lease up to seventeen (17) of the Aircraft
   being exercised via this Contract Change Order to a new corporation to
   be formed in the United States.

ALL OTHER TERMS AND CONDITIONS OF THE AGREEMENT WILL REMAIN UNCHANGED
___________________________________________________________________________
_____

FOR AND ON BEHALF OF:                   FOR AND ON BEHALF OF:

BOMBARDIER INC.                         ATLANTIC COAST AIRLINES


Signed:  __________________________     Signed:__________________________

Date:     __________________________         Date:
__________________________

                           APPENDIX II

                        DELIVERY SCHEDULE

          First Aircraft  ---------
          Second Aircraft-----------
          Third Aircraft--------------
          Fourth Aircraft------------
          Fifth Aircraft--------------
          Sixth Aircraft-------------
          Seventh Aircraft-----------
          Eighth Aircraft-----------
          Ninth Aircraft  ---------
          Tenth Aircraft ----------
          Eleventh Aircraft------------
          Twelfth Aircraft--------------
         Thirteenth Aircraft------------
         Fourteenth Aircraft-------------
         Fifteenth Aircraft-------------
         Sixteenth Aircraft-----------
         Seventeenth Aircraft----------
         Eighteenth Aircraft-----------
         Nineteenth Aircraft---------
         Twentieth Aircraft---------
         Twenty-first Aircraft-------------
         Twenty-second Aircraft--------------
         Twenty-third Aircraft--------------
         Twenty-fourth Aircraft--------------
         Twenty-fifth Aircraft----------
         Twenty-sixth Aircraft-----------
         Twenty-seventh Aircraft--------
         Twenty-eighth Aircraft---------
         Twenty-ninth Aircraft----------
         Thirtieth Aircraft-------------
         Thirty-first Aircraft---------------**
         Thirty-second Aircraft---------------**
         Thirty-third Aircraft-------------**
         Thirty-fourth Aircraft--------------**
         Thirty-fifth Aircraft--------------
         Thirty-sixth                      Aircraft--------------

                           APPENDIX II

                 DELIVERY SCHEDULE  (CONTINUED)


         Thirty-seventh Aircraft-------------
         Thirty-eighth Aircraft-------------
         Thirty-nine Aircraft-------------
         Fortieth Aircraft-------------
         Forty-first Aircraft--------------
         Forty-second Aircraft -----------
         Forty-third Aircraft -------------
         Forty-fourth Aircraft --------------
         Forty-fifth Aircraft --------------**
         Forty-sixth Aircraft -----------
         Forty-seventh Aircraft ---------------**
         Forty-eighth Aircraft ---------------
         Forty-ninth Aircraft ----------------**
         Fiftieth Aircraft ----------------**
         Fifty-first Aircraft --------------**
         Fifty-second Aircraft ---------------**
         Fifty-third Aircraft ---------------**
         Fifty-fourth Aircraft --------------
   **    Fifty-fifth Aircraft --------------**
         Fifty-sixth Aircraft -------------**
         Fifty-seventh Aircraft -----------**
         Fifty-eighth Aircraft --------------**
         Fifty-ninth Aircraft ----------------**
         Sixtieth Aircraft ------------------


                    CUSTOMER SUPPORT SERVICES

ANNEX A -      TECHNICAL SUPPORT, SPARE PARTS, TRAINING AND
          TECHNICAL DATA

The  following Customer Support Services are those  services
to which reference is made in Article 3 of the Agreement.

ARTICLE 1 - TECHNICAL SUPPORT

1.1  Factory Service

     BRAD  agrees to maintain or cause to be maintained  the
     capability  to respond to Buyer's technical  inquiries,
     to   conduct   investigations  concerning   maintenance
     problems  and  to  issue findings and recommend  action
     thereon.  This service shall be provided for as long as
     ten  (10) CL-600-2B19 aircraft remain in commercial air
     transport service.

1.2  Field Service Representative

     1.2.1     Services

          BRAD   shall   assign   one  (1)   Field   Service
          Representative  ("FSR") to Buyer's  main  base  of
          operation  or  other location as may  be  mutually
          agreed.

     1.2.2     Term

***      Such  assignment shall be for ---------------------
          -------------- based on the purchase and  delivery
          of  sixty  (60)  Aircraft to Buyer  (should  Buyer
          eventually  take delivery of less than sixty  (60)
          Aircraft, the term shall be accordingly amended as
          per  Letter Agreement No. 003B Article  3.0),  and
          shall  commence approximately one (1) month  prior
          to  the Delivery Date of the first Aircraft.   The
          FSR  assignment  may  be  extended  on  terms  and
          conditions to be mutually agreed.

     1.2.3     Responsibility

          The  FSR's  responsibility  shall  be  to  provide
          technical advice to Buyer for the line maintenance
          and   operation  of  the  Aircraft   systems   and
          troubleshooting  during scheduled and  unscheduled
          maintenance by Buyer's designated personnel  ("FSR
          Services").

     (vi)  not operating the Aircraft in normal commercial
           airline service.



**   5.0     The term of this Letter Agreement shall commence on the
     date of start of revenue service of Buyer's first Aircraft
     and shall expire five (5) years thereafter and pertains to
     the Aircraft included in the Agreement and the aircraft to
     be delivered under purchase agreement PA-0454 between Buyer
     and Bombardier dated July 29, 1999.

6.0  Without limitation to the foregoing, during any period of
     grounding or operational restrictions, BRAD will diligently
     work to correct the cause(s) relating thereto and Buyer will
     provide all reasonable assistance, if required.

7.0  Limitation

7.1  --------------------------------------------------
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July 29, 1999
Our Ref: B96-7701-RJTL-RJ0350-008A


Atlantic Coast Airlines
515A Shaw Road,
Sterling, Virginia,
U.S.A. 20166


Gentlemen,

Letter Agreement No. 008A to Purchase Agreement No. RJ-0350 dated
January 8, 1997 (the "Agreement" between Bombardier Inc. ("BRAD")
and Atlantic Coast Airlines ("Buyer") relating to the purchase of
sixty (60) Canadair Regional Jet Aircraft (the "Aircraft")

This Letter Agreement No. 008A dated July 29, 1999 cancels and
supersedes Letter Agreement No. 008 dated January 8, 1997.

Subject:       Schedule Completion Rate

1.0  This letter constitutes an integral part of the Agreement
     and evidences our further agreement with the matters set
     forth below.  All terms used herein and in the Agreement and
     not defined herein, shall have the same meaning as in the
     Agreement.

2.0  Intent

     The intent of the Schedule Completion Rate ------------
     ----------  is  to  achieve the full potential  of  the
     inherent  technical  reliability of  Buyer's  sixty  60
     Aircraft exercised by Contract Change Order No.  14  to
     the  Agreement  together with  Buyer's  three  (3)  CRJ
     aircraft   purchased  by  Buyer  pursuant  to  purchase
     agreement PA-0454 dated July 29, 1999 between Buyer and
     Bombardier  Inc. (together redefined as the  "Aircraft"
     for purposes of this Letter Agreement only) -----------
     -------------------------------------------------------
     -------------------------------------------------------
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     -------------------------------------------------------
     ------------------------------------

3.0       Definition

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4.0       --------------------------------------------------
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     -------6.0     Formula

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     7.0  Assumptions

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     8.0  Conditions and Limitations

               8.1  ----------------------------------------
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          8.2  Reporting

               Buyer shall provide to BRAD not later than --
          --------------------------------------------------
          ---  all reports as required by Buyer's regulatory
          authority  relating  to dispatch  reliability  and
          schedule completion.  ----------------------------
          --------------------------------------------------
          --------------------------------------------------
          --------------------------------------------------
          --------------------------------------------------
          -----   Buyer shall also provide BRAD  such  other
          information  and  data  as  BRAD  may   reasonably
          request for the purpose of analyzing -------------
          --------------. BRAD shall respond to the data  in
          a  timely  manner and shall provide Buyer  with  a
          summary  of fleetwide dispatch reliability reports
          --------------------------------------------------
          -------------------------
          8.3  Master Record

               The master record of Schedule Completion Rate
          will  be  maintained by BRAD in its  format  based
          upon  information provided by Buyer's  maintenance
          control program as requested herein.

                BRAD  will  provide a copy to Buyer  of  the
          data.   Buyer shall review the data and if  it  is
          not  in agreement with Buyer's records, Buyer  and
          BRAD will consult to resolve any differences.

9.0  Corrective Action

               9.1   In  the  event  the  achieved  schedule
               completion  rate,  as reported  to  Buyer  by
               BRAD, ---------------------------------------
               ---------------------- BRAD  and  Buyer  will
               jointly  review  the  performance  for   that
               period   to   identify  improvement   changes
               required.  ----------------------------------
               ----------------------------
a)             ---------------------------------------------
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          9.2  ---------------------------------------------
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          shall  be  dependent upon the quality, extent  and
          regularity  of  information and data  reported  to
          BRAD by Buyer.


10.0 Implementation of Changes

     Buyer  may,  at  its option, decline to  implement  any
     change  proposed by BRAD under Article 9.0  above.   If
     Buyer so declines, ------------------------------------
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12.0 -------------------------------------------------------
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13.0 Limitation of Liability

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14.0 The provisions of this Letter Agreement are personal to
Buyer and shall not be assigned or otherwise disposed of by Buyer
without the prior written consent of BRAD, which consent shall
not be unreasonably withheld. Should Buyer request to assign this
Letter Agreement to another entity, BRAD reserves the right to
revise the ------------------to reflect any deviation in any of
the underlying assumptions used to generate the------------------
- --- and to revise the maximum compensation credit to reflect any
changes in the number of Aircraft covered

15.0 This  Letter Agreement constitutes an integral part  of
     the  Agreement and subject to the terms and  conditions
     contained therein.

16.0 In the event of the Termination of the Agreement, this
     Letter Agreement shall become automatically null and void.

Should there be any inconsistency between this Letter Agreement
and the Agreement with respect to the subject matter covered by
the terms hereof, then this Letter Agreement shall prevail.


Yours truly,
BOMBARDIER INC.



________________________                Date:_____________
Michel Bourgeois
Vice President, Contracts





Acknowledged and Accepted


Atlantic Coast Airlines



________________________                Date:_____________
Kerry B. Skeen
President and C.E.O.

            LETTER AGREEMENT NO. 009C SUPERSEDED

                        July 29, 1999

                   Atlantic Coast Airlines
                       515A Shaw Road,
                     Sterling, Virginia,
                        U.S.A. 20166


 Letter Agreement No. 026 to Purchase Agreement No. RJ-0350
  dated January 8, 1997 (the "Agreement" between Bombardier
Inc. ("BRAD") and Atlantic Coast Airlines ("Buyer") relating
to the purchase of sixty (60) Canadair Regional Jet Aircraft
                      (the "Aircraft")

                 Subject:  Interim Aircraft


                         Gentlemen:

This  letter  constitutes an integral part of the  Agreement
and  evidences  our further agreement with  respect  to  the
matters  set forth below. All terms used herein and  in  the
Agreement  and  not  defined herein,  shall  have  the  same
meaning as in the Agreement.

1.0  --------------------------------------------------
     --------------------------------------------------
     --------------------------------------------------
     --------------------------------------------------
     --------------------------------------------------
     --------------------------------------------------
     ---  BRAD  shall have the flexibility  to  provide
     interim   Canadair  Regional  Jet  Aircraft   (the
     "Interim  Aircraft")  on  lease  for  periods  not
     exceeding  ------------------ under the  following
     general conditions:

     BRAD shall provide written notice to Buyer of  its
     intention to substitute Interim Aircraft for the -
     ---------- Aircraft deliveries and a form of short
     term lease no later than ---------------- prior to
     the  first day of the Scheduled Delivery  Date  of
     each  of  the  ------------- Aircraft  deliveries.
     After  notice  to  Buyer of  BRAD's  intention  to
     provide  the  first Interim Aircraft, Buyer  shall
     have-------------------------- to review the  form
     of  lease and to negotiate with BRAD with  respect
     to  the form of lease, unless the parties mutually
     agree to extend the lease negotiation period.  The
     parties  shall negotiate such lease terms in  good
     faith.  Thereafter, Buyer shall advise BRAD if  it
     elects to accept the Interim Aircraft or to  defer
     the  corresponding ------------- Aircraft delivery
     to  a Scheduled Delivery Date when Bombardier will
     have  Aircraft  available (within  the  three  (3)
     month period identified in this paragraph 1.0).

     The Interim Aircraft shall;

          i)be in a neutral paint scheme;

          ii)     require  no additional crew  training
            (other than what is currently required  for
            Buyer's flight and maintenance personnel);

          iii)    be leased at a lease rate -----------
            ------------------------------------------
            ------------------------------------------
            ------------------------------------------
            ----------------

          iv)     require maintenance reserves --------
            ------------------------------ and

          v)have a lease period which shall end on  the
            day  Buyer obtains FAA approval to add  the
            applicable  --------- Aircraft  on  Buyer's
            operations   specifications,   which   will
            occur  no later than ---------------- after
            the  initial day of the lease,  unless  the
            parties mutually agree otherwise to  extend
            the term of the Interim Aircraft lease.


     1.1  With  respect  to the Interim Aircraft  other
          than  the first Interim Aircraft accepted  by
          Buyer, Buyer shall have the right, within ---
          --------------------- following  notice  from
          BRAD  of  a  substitution of  a  ------------
          Aircraft  with an Interim Aircraft, to  elect
          not to take the Interim Aircraft and to defer
          the   corresponding  --------------  Aircraft
          delivery  to a Scheduled Delivery  Date  when
          Bombardier   will  have  Aircraft   available
          (within   the  ---------------------   period
          identified in paragraph 1.0).

     1.2  BRAD shall use reasonable efforts to minimize
          use  of  the  Interim Aircraft as  substitute
          aircraft  for Buyer's ------------- Aircraft,
          so as to minimize slip of Buyer's -----------
          ---- Aircraft in the following calendar year.

     1.3  The  form  of lease for the Interim  Aircraft
          shall  conform  to this Letter Agreement  and
          will contain reasonable terms which shall  be
          subject  to  the  mutual  agreement  of   the
          parties.


2.0  In  the event of the termination of the Agreement,
     this  Letter  Agreement shall become automatically
     null and void.

3.0  The   provisions  of  this  Letter  Agreement  are
     personal  to  Buyer and shall not be  assigned  or
     otherwise  disposed of by Buyer without the  prior
     written consent of Bombardier.

4.0  This  Letter Agreement constitutes an integral part  of
     the   Agreement  and  is  subject  to  the  terms   and
     conditions  contained therein.  To the  extent  of  any
     inconsistency or conflict between this Letter Agreement
     and the Agreement, this Letter Agreement shall prevail.


Yours truly,
BOMBARDIER INC.



________________________                Date:_____________
Michel Bourgeois
Vice-President, Contracts




Acknowledged and Accepted




ATLANTIC COAST AIRLINES



________________________                Date:_____________
Kerry B. Skeen
President and C.E.O.





July 29 1999

Atlantic Coast Airlines
515A Shaw Road,
Sterling, Virginia,
U.S.A. 20166

Letter  Agreement No. 027 to Purchase Agreement No.  RJ-0350
dated  January  8, 1997 (the "Agreement" between  Bombardier
Inc. ("BRAD") and Atlantic Coast Airlines ("Buyer") relating
to the purchase of sixty (60) Canadair Regional Jet Aircraft
(the "Aircraft")

Subject:  Assignment

Gentlemen:

This  letter  constitutes an integral part of the  Agreement
and  evidences  our further agreement with  respect  to  the
matters  set forth below. All terms used herein and  in  the
Agreement  and  not  defined herein,  shall  have  the  same
meaning as in the Agreement.

1.0  Buyer  shall  have  the right to assign  its  right  to
     purchase  and  to lease up to seventeen  (17)  Aircraft
     being  exercised  by  Contract  Change  Order  No.   14
     (Aircraft  44-60) to a new corporation to be formed  in
     the U.S. ("Newco") subject to:

     (i)  Newco shall be a U.S. citizen;

     (ii) section 1110 of the U.S. Bankruptcy Code applies;

     (iii)  the  provisions of Articles 20.1, 20.2, 20.3  of
        the  Agreement  and Article 4.0 of Letter  Agreement
        No. 005b;

     (iv) financing shall be based on Buyer's credit; and

     (v) additional reasonable terms and conditions required
        due  to  the  different structure of the transaction
        and  aircraft  operations following  disclosure  and
        due diligence of the transaction envisaged.

3.0  Subject to the satisfaction of the foregoing,  the
     assignment  shall then be an assignment  permitted
     pursuant  to  the  terms  of  Article  20  of  the
     Agreement, such that Newco will be entitled to all
     benefits  (including  FIPP) as  contained  in  the
     Agreement.

4.0  In  the event of the termination of the Agreement,
     this  Letter  Agreement shall become automatically
     null and void.

5.0  The   provisions  of  this  Letter  Agreement  are
     personal  to  Buyer and shall not be  assigned  or
     otherwise  disposed of by Buyer without the  prior
     written consent of Bombardier.




Yours truly,

BOMBARDIER INC.



________________________                Date:_____________
Michel Bourgeois
Vice-President, Contracts




Acknowledged and Accepted




ATLANTIC COAST AIRLINES



________________________                Date:_____________
Kerry B. Skeen
President and C.E.O.
                        CONTRACT CHANGE ORDER


PURCHASER:                Atlantic Coast Airlines

PURCHASE AGREEMENT NO.:   RJ-350             AIRCRAFT TYPE: CRJ

C.C.O. NO.:               15                 DATED: September 10,
1999

PAGES:                    21



                               REASON FOR CHANGE:

       To  amend  the Purchase Agreement to (i) revise the Scheduled
 Delivery  Dates  for  the Twenty-fourth, the  Twenty-sixth  through
 Thirty-first and Thirty-Third through Sixtieth Aircraft,  and  (ii)
 introduce  a new Airframe Direct Maintenance Cost Guarantee  Letter
 Agreement  to reflect the current order of sixty (60) Aircraft  and
 to  include  within the Letter Agreement the six (6)  CRJ  aircraft
 purchased by Buyer pursuant to purchase agreement PA-0454.

 PAGES TO BE SUBSTITUTED:                NEW/REVISED PAGES

 Purchase Agreement pages 56 and 56A        Attachment No. 1 to CCO
No. 15
 Letter Agreement No. 009C           Attachment No. 2 to CCO No. 15

 DESCRIPTION OF CHANGE:

   P.A. Pages 56 & 56A - Appendix II (Delivery Schedule)
 The   Delivery  Schedule  is  amended  by  revising  the  Scheduled
 Delivery  Dates  for  the Twenty-fourth, the  Twenty-sixth  through
 Thirty-first and the Thirty-Third through Sixtieth Aircraft.

 Letter Agreement No. 009D (Airframe Direct Maintenance Cost)
 Letter  Agreement  No.  009C is hereby deleted  and  replaced  with
 Letter Agreement No. 009D to incorporate changes to reflect  a  new
 guarantee  value for the Airframe Direct Maintenance Cost Guarantee
 ("ADMCG") which takes into account Buyer's current order  of  Sixty
 (60)  Aircraft,  and  to  include under the  Letter  Agreement  CRJ
 aircraft  to  be delivered to Buyer pursuant to purchase  agreement
 No. PA-0454 between Bombardier and Buyer.

 The guarantee value shall be --------------------------------------
- --------------------------------------------------------------------
- -------------



ALL OTHER TERMS AND CONDITIONS OF THE AGREEMENT WILL REMAIN
UNCHANGED

____________________________________________________________________
____________________

FOR AND ON BEHALF OF:                   FOR AND ON BEHALF OF:

Bombardier Inc.                         Atlantic Coast Airlines
Bombardier Aerospace
Regional Aircraft

Signed:  __________________________
Signed:__________________________

Date:  ____________________________     Date:
___________________________


                           APPENDIX II

                        DELIVERY SCHEDULE

          First Aircraft-------------
          Second Aircraft---------------
          Third Aircraft---------------
          Fourth Aircraft-----------------
          Fifth Aircraft----------------
          Sixth Aircraft-----------------
          Seventh Aircraft----------------
          Eighth Aircraft----------------
          Ninth Aircraft----------------
          Tenth Aircraft---------------
         Eleventh Aircraft----------------
         Twelfth Aircraft------------------
         Thirteenth Aircraft-----------------
         Fourteenth Aircraft-----------------
         Fifteenth Aircraft---------------
         Sixteenth Aircraft---------------
         Seventeenth Aircraft---------------
         Eighteenth Aircraft---------------
         Nineteenth Aircraft---------------
         Twentieth Aircraft---------------
         Twenty-first Aircraft----------------
         Twenty-second Aircraft--------------
         Twenty-third Aircraft----------------*
         Twenty-fourth Aircraft----------------
         Twenty-fifth Aircraft------------
   *     Twenty-sixth Aircraft---------------*
         Twenty-seventh Aircraft--------------
   *     Twenty-eighth Aircraft------------
   *     Twenty-ninth Aircraft-------------*
         Thirtieth Aircraft---------------
   *     Thirty-first Aircraft----------------
         Thirty-second Aircraft--------------
   *     Thirty-third Aircraft--------------
   *     Thirty-fourth Aircraft---------------
   *     Thirty-fifth Aircraft-------------
   *     Thirty-sixth Aircraft-------------

                           APPENDIX II

                 DELIVERY SCHEDULE  (CONTINUED)


   *     Thirty-seventh Aircraft--------------*
         Thirty-eighth Aircraft----------------*
         Thirty-nine Aircraft----------------
   *     Fortieth Aircraft----------------
   *     Forty-first Aircraft----------------*
         Forty-second Aircraft --------------
   *     Forty-third Aircraft --------------
   *     Forty-fourth Aircraft ---------------
   *     Forty-fifth Aircraft ---------------*
         Forty-sixth Aircraft --------------
   *     Forty-seventh Aircraft -----------*
         Forty-eighth Aircraft --------------
   *     Forty-ninth Aircraft ---------------*
         Fiftieth Aircraft ---------------
   *     Fifty-first Aircraft ---------------*
         Fifty-second Aircraft ---------------
   *     Fifty-third Aircraft ----------------*
         Fifty-fourth Aircraft ----------------
   *     Fifty-fifth Aircraft ---------------*
         Fifty-sixth Aircraft ----------------
   *     Fifty-seventh Aircraft --------------
   *     Fifty-eighth Aircraft ------------*
         Fifty-ninth Aircraft ---------------
*         Sixtieth Aircraft   -----------------



September 10, 1999
Our Ref: B96-7701-RJTL-RJ0350-009D


Atlantic Coast Airlines
515A Shaw Road,
Sterling, Virginia,
U.S.A. 20166


Dear Sirs,

Letter Agreement No. 009D to Purchase Agreement No. RJ-
0350  dated  January  8, 1997 (the "Agreement"  between
Bombardier  Inc. ("BRAD") and Atlantic Coast  Airlines,
Inc.  ("Buyer") relating to the purchase of sixty  (60)
Canadair Regional Jet Aircraft (the "Aircraft")


This Letter Agreement No. 009D dated September 10, 1999
cancels and supersedes Letter Agreement No. 009C  dated
July 29, 1999.


Subject:       Airframe Direct Maintenance Cost

1.0  This  letter constitutes an integral part  of  the
     Agreement and evidences our further agreement with
     the  matters  set  forth below.   All  terms  used
     herein  and  in  the  Agreement  and  not  defined
     herein,  shall  have the same meaning  as  in  the
     Agreement.


2.0       Intent

          2.1    The  intent  of  the  Airframe  direct
          maintenance  cost ----------- is  to  achieve
          the full potential of the maintainability  of
          the  Buyer's  sixty 60 Aircraft exercised  by
          Contract Change Order No. 14 to the Agreement
          together  with Buyer's six (6)  CRJ  aircraft
          purchased  by  Buyer  pursuant  to   purchase
          agreement PA-0454 dated July 29, 1999 between
          Buyer and Bombardier Inc. (together redefined
          as the "Aircraft" for purposes of this Letter
          Agreement only) -----------------------------
          -------------------  ------------------------
          ---------------------------------------------
          ---------------------------------------------
          ----------------
          2.2   The  "Airframe" shall mean the Aircraft
          excluding  Power  Plant  Parts,  APU   parts,
          seatcovers  and  carpets,  Collins   Avionics
          Components,  Buyer Furnished Equipment  (BFE)
          and Ground Support Equipment (GSE).

3.0       Airframe Direct Maintenance Cost ----------
            3.1  ----------------------------------------
          ---------------------------------------------
          ---------------------------------------------
          ---------------------------------------------
          ---------------------------------------------
          ---------------------------------------------
          ---------------------------------------------
          ---------------------------------------------
          ---------------------------------------------
          ---------------------------------------------
          -

                          3.1.1      The term  of  this
                 Letter  Agreement  shall  commence  on
                 the  first  day of the month following
                 delivery  of  the first  Aircraft  and
                 shall end seven (7) years thereafter;

                         3.1.2     ----------------------
                 -------------------------------------
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                 --------------

                    3.1.3     -------------------------
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               ----------
                       3.2  ---------------------------
                 -------------------------------------
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                 -------------------------

                              a)   --------------------
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                    ---

4.0                 Calculation of Cost

          4.1   Airframe  Direct  Maintenance  Material
          Cost ("ADMMC")

                The  ADMMC  is defined as the  cost  of
          material  consumed,  which  excludes  initial
          provisioning   purchases,  for   the   direct
          airframe  maintenance of the  aircraft,  less
          any  transportation, duties, taxes or license
          fees.  Notwithstanding Buyer's internal  cost
          allocation  system all elements  of  indirect
          material    such   as   cleaning    supplies,
          consumable tools, hydraulic fluids, oils  and
          greases,  welding supplies and adhesives  are
          excluded from the calculation of ADMMC.


          4.2   Airframe  Direct Outside  Service  Cost
          ("ADOSC")

                 The  ADOSC  is  defined  as  the  cost
          expended  in  outside  services  for   direct
          airframe  and  component maintenance  of  the
          aircraft.  The ADOSC shall include the  total
          outside  service charges of both  labour  and
          material  costs, but excluding transportation
          and taxes.


4.3  Hourly Airframe Direct Maintenance Cost ("ADMC")

                The following formula shall be used  to
          calculate the hourly ADMC:

                 ADMC =  ADMMC + ADOSC
                                T
               Where:

                    ADMMC      =      Airframe   Direct
          Maintenance Material Cost,

                  ADOSC    =    Airframe Direct Outside
          Service Cost,

                  T     =   Total flight hours for  the
          Aircraft   recorded   for                 the
          applicable period.


          4.4  Exclusion of In-House Labour Costs

                  For more certainty, the parties agree
          that  all  labour costs incurred in-house  by
          Buyer  in maintaining the Aircraft, including
          but  not  limited  to scheduled  and  routine
          maintenance,  troubleshooting,  removal   and
          installation of parts, is excluded-----------
          -----------

5.0       ------------------

5.1       --------------------------------

          5.1.1     -----------------------------------
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          ------------------
                    5.1.2     -------------------------
                    -----------------------------------
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                    ----------
          5.1.3     -----------------------------------
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          ---------------------

          5.1.4     -----------------------------------
          ---------------------------------------------
          -----------------------------



5.2       ----------------------------------

            5.2.1     -----------------------------------
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          ----------------------------

          5.2.2     -----------------------------------
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          ---------

          6.0  Final Adjustment

          6.1  ----------------------------------------
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          -------------


                    6.2  ------------------------------
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                    ------

          6.3  ----------------------------------------
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          6.7  ----------------------------------------
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7.0       ---------------------------------------------
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8.0       Reporting

          8.1  Buyer will furnish data to BRAD to allow
          BRAD  to  carry out its analysis and tracking
          of  Buyer's maintenance costs with respect to
          -----------------.  If  Buyer   is   not   in
          agreement  with BRAD's request  for  specific
          data  and format, Buyer and BRAD will consult
          to resolve any differences.

          8.2  BRAD shall provide a quarterly report to
          Buyer  on  the status of the Airframe  direct
          maintenance cost based on the data  submitted
          by  Buyer  and approved by BRAD.  BRAD  shall
          review the report and, if the supporting data
          is  not  in  agreement with Buyer's  records,
          Buyer  and  BRAD will consult to resolve  any
          differences.  -------------------------------
          ---------------------------------------------
          ---------------------------------------------
          ---------------------------------------------
          -------

          8.3   BRAD  shall not contest  any  data,  as
          supplied by Buyer, once the -----------------
          ------ has been agreed to.

          8.4  ----------------------------------------
          ---------------------------------------------
          ---------------------------------------------
          ---------------------------------------------
          --------------------------


9.0       Limitation of Liability

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     -.

10.0 The   provisions  of  this  Letter  Agreement  are
     personal  to  Buyer and shall not be  assigned  or
     otherwise  disposed of by Buyer without the  prior
     written  consent  of  BRAD,  which  shall  not  be
     unreasonably  withheld. Should  Buyer  request  to
     assign  this  Letter Agreement to another  entity,
     BRAD reserves the right to revise the ------------
     --------- to reflect any deviation in any  of  the
     underlying assumptions used to generate the ------
     --------------------, and to  revise  the  maximum
     compensation credit to reflect any changes in  the
     number of Aircraft covered.

11.0 This Letter Agreement constitutes an integral part
     of  the  Agreement and subject to  the  terms  and
     conditions contained therein.

12.0  In the event of the termination of the Agreement,
this  Letter Agreement shall become automatically  null
and  void unless this Agreement is terminated by  Buyer
pursuant  to  Article 16.1 or 16.2 as  a  result  of  a
default  or breach of this Agreement by BRAD, or  as  a
result of an Excusable Delay or -----------------------
- -------------------------------------------------------
- -------------------------------------------------------
- -------------------------------------------------------
- -------------------------------------------------------
- --------------------------------------
Should  there be any inconsistency between this  Letter
Agreement and the Agreement with respect to the subject
matter  covered by the terms hereof, then  this  Letter
Agreement shall prevail.


Yours very truly,
BOMBARDIER INC.



________________________                Date:_____________
Scott Preece
Manager, Contracts





Acknowledged and Accepted


ATLANTIC COAST AIRLINES



________________________                Date:_____________
Kerry B. Skeen
President and C.E.O.

                         APPENDIX A

AIRFRAME DIRECT MAINTENANCE COST ----------
- ---------------------------


The  following is a listing of all assumptions used  to
determine  --------- per flight hour.  It is understood
by  the  parties that these assumptions may  change  in
which  case  the  parties, with mutual agreement,  will
adjust -----------

1.   All costs are based upon Specification.

2.   All  costs are based on the maintenance inspection
     intervals   in   the  Buyer's  regulatory   agency
     approved maintenance program.

3.   All  costs  are expressed in July 1,  1997  United
     States Dollars subject to escalation in accordance
     with  the  terms  of Appendix  B  of  this  Letter
     Agreement,  and are rounded to the  nearest  whole
     dollar.

5.   Buyer's subcontract airframe labour rate per  man-
     hour is ------------------------------------------
     --------------------------------------------------
     -------------------------------------------
6.   --------------------------------------------------
     ----------------------
7.   Annual  average Aircraft utilization is  not  more
     than -------------------------------------- flight
     hours per year.

8.   Buyer's  average  annual flight duration  for  the
     Aircraft will be -------------------- minutes  per
     departure.

9.   Total  number of Aircraft Buyer has on firm  order
     from BRAD (including delivered Aircraft under  the
     Agreement and Aircraft purchased by Buyer pursuant
     to  purchase agreement PA-0454 between  Buyer  and
     Bombardier)       --------------------------------
     Should  Buyer's  average  annual  flight  duration
     change throughout the ----------------------------
     --------, a new Airframe Direct Maintenance Cost -
     --------------- value will be generated as per the
     following formula:


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

9.   Buyer's subcontracted maintenance cost levels are:

     ATA CHAPTER              PERCENT

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                         APPENDIX B

              ADMCG Economic Adjustment Formula


The  ADMCG  economic adjustment will be calculated  using
the ----------------------------------- Formula.  The ---
- ---------  term  is  specified in Section  3.1.1  of  the
Letter Agreement.

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