Exhibit 10.41A(1) Atlantic Coast Airlines xAmended xxAdded CONTRACT CHANGE ORDER PURCHASER: Atlantic Coast Airlines PURCHASE AGREEMENT NO.: RJ-0454 (the "Agreement") AIRCRAFT TYPE: CRJ C.C.O. NO.: 1 DATED: September 24, 1999 PAGES: 9 REASON FOR CHANGE To amend the Purchase Agreement and Letter Agreement No. 001 to: (i) revise the Schedule Delivery Dates for the xxxxxx Aircraft and to increase the order to six (6) Firm Aircraft, (ii) extend the term of the FSR due to the additional three (3) Aircraft being acquired, (iii) extend the term of the revision services due to the change in the delivery position of the xxxxxx Aircraft, (iv) provide a xxxxxx for the credit memorandum to be issued for each of the xxxxxx Aircraft and, (v) to provide a xxxxxx credit memorandum for the xxxxxx Aircraft. PAGES TO BE SUBSTITUTED NEW/REVISED PAGES Purchase Agreement page 52 Attachment 1 to CCO No. 1 Purchase Agreement page no. C-1 Attachment 2 to CCO No. 1 Purchase Agreement page no. C-24 Attachment 3 to CCO No. 1 Letter Agreement No. 001 Attachment 4 to CCO No. 1 Letter Agreement No. 009 page 2 Attachment 5 to CCO No. 1 DESCRIPTION OF CHANGE: P.A. and all Letter Agreements All references to three (3) Aircraft are hereby changed to refer to six (6) Aircraft. P.A. Page 52 - Appendix II (Delivery Schedule) The Delivery Schedule is amended by revising the Scheduled Delivery Dates for the xxxxxx and adding Scheduled Delivery Dates for the xxxxxx Aircraft. P.A. Page C-1 - (FSR Term) The term for the FSR is amended from xxxxxx to xxxxxx. P.A. page C-24 - NOTE 1: Revision Service The term for the revision services is amended from xxxxxx following the Delivery Date of Buyer's first Aircraft. Letter Agreement No. 001 Letter Agreement No. 001 is hereby deleted and replaced with Letter Agreement No. 001A to incorporate changes to reflect the xxxxxx of the credit memorandum to be issued for the xxxxxx Aircraft and to provide a xxxxxx credit memorandum for the xxxxxx Aircraft. Letter Agreement No. 009 page 2 Letter Agreement No. 009 is amended to reflect that it shall not apply to the xxxxxx credit memorandum provided for the Aircraft set forth in Article 3.0 of Letter Agreement No. 001A. Notwithstanding Article 5.1 of the Agreement, Buyer confirms that it has not yet made a deposit of xxxxxx for the Fourth, Fifth, and Sixth Aircraft, totaling a further xxxxxx. This deposit shall be made by Buyer to Bombardier on or before October 1, 1999. This CCO No. 1 is conditional upon Buyer receiving approval from its Board of Directors xxxxxx (the "Approval Date"). In the event that the Board of Directors does not approve the execution of this CCO No. 1, together with CCO No. 15 to Purchase Agreement No. 0350, by the Approval Date, Buyer may terminate this CCO No. 1, together with CCO No. 15 to Purchase Agreement No. 0350, by giving written notice to Bombardier of its intention to do so by such Approval Date. Should Buyer fail to notify Bombardier by the Approval Date, this CCO No. 1, together with CCO No. 15 to Purchase Agreement No. 0350, shall become unconditionally valid and binding. EXCEPT AS SET FORTH ABOVE OR IN THE ATTACHMENTS HERETO, 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 x First Aircraft xxxxxx x Second Aircraft xxxxxx x Third Aircraft xxxxxx xx Fourth Aircraft xxxxxx xx Fifth Aircraft xxxxxx xx Sixth Aircraft xxxxxx 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 Bombardier 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 Bombardier 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 x Such assignment shall be for xxxxxx, 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"). TECHNICAL DATA REGIONAL JET ITEM DOC CONF MEDIUM QTY REV DEL ATA REMARKS 1. AIRCRAFT MAINTENANCE MANUAL G 1, 2 xxxxxx Y PTD Y (AMM) 2. ILLUSTRATED PARTS G 1, 2 xxxxxx Y PTD Y MANUAL/CATALOG (IPC) 3. STRUCTURAL REPAIR MANUAL G 1, 2 xxxxxx Y PTD Y (SRM) 4. COMPONENT MAINTENANCE MANUAL G 1, 2 xxxxxx Y PTD Y (CMM) 5. POWER PLANT BUILD-UP MANUAL G 1, 2 xxxxxx Y PTD Y 6. WIRING DIAGRAM MANUAL C 1, 2 xxxxxx Y PTD Y 7. ILLUSTRATED TOOL & EQUIPMENT G 1, 2 xxxxxx Y PTD Y MANUAL (ITEM) 8. SERVICE BULLETINS G 1 xxxxxx S PTD Y SEE NOTE 2 9. NON DESTRUCTIVE TEST MANUAL G 1 xxxxxx Y PTD Y (NDT) 10. MAINTENANCE PROGRAM DOCUMENT G 1 xxxxxx S PTD Y SEE NOTE 3 (MPD) 11. FAA OR DOT AIRPLANE FLIGHT C 1 xxxxxx S ATD N MANUAL (AFM) 12. WEIGHT & BALANCE MANUAL G 1 xxxxxx Y ATD Y 13. MASTER MINIMUM EQUIPMENT LIST G 1 xxxxxx S ASAP N (MMEL) 14. QUICK REFERENCE HANDBOOK C 1 xxxxxx S ATD N 15. FLIGHT CREW OPERATING MANUAL C 1 xxxxxx S ATD N SEE NOTE 1 (FCOM) 16. MAINTENANCE TASK CARDS C 3 xxxxxx S PTD N 17. ACCESS PANELS AND G 1 xxxxxx N PTD N DOORS/COMPONENT LOCATION MANUAL 18. FLIGHT PLANNING & CRUISE G 1 xxxxxx S ASAP N CONTROL MANUAL 19. AIRCRAFT CHARACTERISTICS FOR G 1 xxxxxx N ASAP N SEE NOTE 4 AIRPORT PLANNING 20. ON-BOARD WIRING DIAGRAM BOOK C 3 xxxxxx N ATD N SEE NOTE 5 21. MAINTENANCE FACILITIES & G 1 xxxxxx S ASAP N EQUIPMENT PLANNING MANUAL 22. SYSTEM SCHEMATIC MANUAL (SSM) G 1, 2 xxxxxx Y ATD Y SEE NOTE 1 23. PASSENGER INFORMATION SHEET G 3 xxxxxx S ATD N SEE NOTE 6 24. PILOT CHECKLIST C 4 xxxxxx S ATD N 25. CRASH CREW CHART G 4 xxxxxx S ATD N 26. DISPATCH DEVIATION GUIDE G 1 xxxxxx S PTD N NOTE 1: REVISION SERVICE A. Revision services shall be available without charge for xxxxxx following the Delivery Date of Buyer's first Aircraft. Subsequent revision service shall be provided dependent upon incorporation of Bombardier issued Service Bulletins. B. Revisions to the Technical Data to reflect the Aircraft at Delivery Date shall be provided to Buyer within six (6) months following the Delivery Date of each of the Aircraft, respectively. C. Provided the revision service is being supplied under the terms of this Agreement or by subsequent purchase order, Bombardier shall incorporate in the applicable documents all applicable Bombardier originated Service Bulletins in a regular revision following formal notification by Buyer that such Service Bulletins shall be accomplished on the Buyer's Aircraft. The manuals shall then contain both original and revised configuration until Buyer advises Bombardier in writing that one configuration is no longer required. September 24, 1999 Atlantic Coast Airlines 515A Shaw Road, Dulles, Virginia, U.S.A. 20166 Gentlemen, Letter Agreement No. 001A to Purchase Agreement No. PA-0454 dated July 29, 1999 (the "Agreement" between Bombardier Inc. ("Bombardier") and Atlantic Coast Airlines ("Buyer") relating to the purchase of six (6) Canadair Regional Jet Aircraft (the "Aircraft") This Letter Agreement No. 001A dated September 24, 1999 cancels and supersedes Letter Agreement No. 001 dated July 29, 1999. Subject: Credit Memoranda 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 In consideration of Buyer having entered into the above referenced Agreement for the purchase of six (6) Aircraft (and for the exercise of any Option Aircraft (as defined in Letter Agreement No. 003)), Bombardier will issue to Buyer, upon delivery and payment of the price of the Aircraft in accordance with the Agreement, (i) for each of the xxxxxx Aircraft (including any delivered Option Aircraft), a credit memorandum in the amount of xxxxxx; and xxxxxx 3.0 In consideration of Buyer having entered into the above referenced Agreement, Bombardier will issue to Buyer, upon delivery and payment of the price of the Aircraft in accordance with the Agreement, for each of the xxxxxx Aircraft (excluding any delivered Option Aircraft), a xxxxxx credit memorandum in the amount of xxxxxx . 4.0 xxxxxx The credit memorandum will xxxxxx be adjusted on the same pro-rata percentage calculation as other aircraft price changes due to changes in the Specification or Buyer selected optional features as otherwise provided for in this Agreement. The credit memorandum, as adjusted, will collectively be known as the "Credit Memoranda". 5.0 In the event of the Termination of the Agreement, this Letter Agreement shall become automatically null and void with respect to any undelivered Aircraft. 6.0 The provisions of this Letter Agreement are personal to Buyer and shall not be assigned or otherwise disposed of by Buyer, except as required for financing purposes in accordance with Letter Agreement No. 004 (Financing) and except as part of an assignment of the Agreement as expressly permitted in Article 20 of the Agreement, without the prior written consent of Bombardier. 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:_____________ Scott Preece Director, Contracts Acknowledged and Accepted Atlantic Coast Airlines ________________________ Date:_____________ Name: Title: Attachment No. 5 to C.C.O. No. 2 dated August 2, 2000 Letter Agreement 009 Reconciliation xxxxxx 3.0 xxxxxx 4.0 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. 5.0 The provisions of this Letter Agreement are personal to Buyer and shall not be assigned or otherwise disposed of by Buyer except as part of an assignment of the Agreement (in whole not in part) expressly permitted under Article 20 of the Agreement and otherwise such consent shall not be unreasonably withheld. 6.0 In the event of the Termination of the Agreement, this Letter Agreement shall become automatically null and void with respect to any undelivered Aircraft. CONTRACT CHANGE ORDER PURCHASER: Atlantic Coast Airlines PURCHASE AGREEMENT NO.: RJ-0454 (the "Agreement")AIRCRAFT TYPE: CRJ C.C.O. NO 2 DATED: August 2, 2000 PAGES: 27 REASON FOR CHANGE To amend the Agreement to: (i) give effect to the exercise by Buyer of seventeen (17) Option Aircraft and provide Buyer with thirteen (13) incremental Aircraft and thereby increase the order to thirty- six (36) firm Aircraft, (ii) revise the payment terms for the Aircraft, (iii) revise the amount of the credit memorandum applicable to the Aircraft, (iv) provide Buyer with an additional xxxxxx credit memorandum for the Aircraft, (v) provide Buyer with an additional forty (40) Option Aircraft, subject to certain conditions, (vi) provide that Letter Agreement No. 009 (Reconciliation) shall be applicable to the additional xxxxxx credit memorandum for the Aircraft as provided herein, (vii) amend the Assignment Letter Agreement to reconfirm assignability to "Newco", subject to certain conditions and to confirm assignability to Atlantic Coast Jet, Inc xxxxxx subject to certain conditions, (viii) note that a credit has been provided by Bombardier with respect to the complex paint scheme in Buyer Selected Optional Features resulting in this option being provided at xxxxxx, (ix) extend the term of the FSR due to the additional thirty (30) Aircraft being acquired, (x) extend the term of the revision services due to xxxxxx, and (xi) amend Article 4 of Letter Agreement No. 005 to clarify the procedure by which Buyer xxxxxx PAGES TO BE SUBSTITUTED NEW/REVISED PAGES Purchase Agreement page 12-12a Attachment 1 to CCO No. 2 Purchase Agreement page no. 52 Attachment 2 to CCO No. 2 Purchase Agreement page no. C-1 Attachment 3 to CCO No. 2 Purchase Agreement page no. C-24 Attachment 4 to CCO No. 2 Letter Agreement No. 001B Attachment 5 to CCO No. 2 Letter Agreement No. 002A Attachment 6 to CCO No. 2 Letter Agreement No. 004 pages 1&3 Attachment 7 to CCO No. 2 Letter Agreement No. 005 page 3 Attachment 8 to CCO No. 2 Letter Agreement No. 006 page 2 Attachment 9 to CCO No. 2 Letter Agreement No. 009 page 2 Attachment 10 to CCO No. 2 Letter Agreement No. 012 Attachment 11 to CCO No. 2 DESCRIPTION OF CHANGE: P.A. and all Letter Agreements All references to six (6) Aircraft are hereby changed to refer to thirty-six (36) Aircraft. P.A. Page 12 - Article 5.2 (Payment) Article 5 - Payment is amended to reflect the acknowledgement of a deposit for xxxxxx Aircraft only and to change the payment terms for the Aircraft from xxxxxx of the Aircraft Base Price less the deposit at each of xxxxxx prior to the Scheduled Delivery Date of xxxxxx to the following: xxxxxx P.A. Page 52 - Appendix II (Delivery Schedule) The Delivery Schedule is amended to add the seventeen (17) Option Aircraft being exercised and the thirteen (13) incremental Aircraft being purchased. P.A. Page C-1 - (FSR Term) The term for the FSR is amended from xxxxxx due to the exercise of the seventeen (17) Option Aircraft and the purchase of thirteen (13) incremental Aircraft. P.A. page C-24 - NOTE 1: Revision Service The term for the revision services is amended from xxxxxx following the Delivery Date of Buyer's first Aircraft. P.A. Appendix IV - Buyer Selected Optional Features It is hereby noted that xxxxxx for CR Ref. N 11-300 resulting in this optional feature being incorporated on the Aircraft xxxxxx as it is shown in Appendix IV of the Agreement. In addition, Bombardier agrees that `CR N 34-335 FMS - Single, ACARS Capable' will replace 'CR N 34-330 FMS - Single (collins FMS-4200)', and the xxxxxx shall be incorporated into the Aircraft, subject to Bombardier's lead times and xxxxxx CRN 34-335 shall appear in Appendix IV to the Agreement xxxxxx CR N 34-330 and such change will be reflected in a Contract Change Order to be finalized by the parties. Letter Agreement No. 001 - (Credit Memorandum) Letter Agreement No. 001A is hereby deleted and replaced with Letter Agreement No. 001B to incorporate changes to reflect the xxxxxx of the credit memorandum to be issued for the Aircraft and to delete Article 3.0 referring to the xxxxxx for the xxxxxx Aircraft. Letter Agreement No. 002 - (Assignment) Letter Agreement No. 002 is hereby amended by deleting reference to ""up to three (3) of the Aircraft (Aircraft 1-3)" and replacing it with "the Aircraft" and to reconfirm assignability to "Newco", subject to certain conditions, and to confirm assignability to Atlantic Coast Jet, Inc.xxxxxx, subject to certain conditions. Letter Agreement No. 003 - (Option Aircraft) Letter Agreement No. 003 is no longer applicable and is hereby canceled. (New Option Aircraft Letter Agreement (LA 12) introduced below). Letter Agreement No. 004 - (Financing) Letter Agreement No. 004 is hereby amended by deleting reference to "xxxxx and replacing it with xxxxx" In addition, Article 4.0 is amended to provide that the xxxxxx. Letter Agreement No. 005 - Additional Customer Support Article 4.0 of Letter Agreement No. 005 is amended to provide a procedure by which Buyer xxxxxx Letter Agreement No. 006 - (xxxxxx Credit) Letter Agreement No. 006 is hereby amended to add an additional xxxxxx credit memorandum in the amount of xxxxxx for each of the delivered Aircraft. Letter Agreement No. 009 - (Reconciliation) Letter Agreement No. 009 is hereby amended to provide that its terms are applicable to the additional xxxxxx credit memorandum provided for the Aircraft as set forth in the above paragraph and to provide for the xxxxxx. Letter Agreement No. 012 - (Additional Option Aircraft) Letter Agreement No. 012 is introduced to provide Buyer with an additional forty (40) Option Aircraft, on terms and conditions provided therein. Notwithstanding the Delivery Schedule, as amended, prior to this CCO No. 2 becoming a firm agreement for the Conditional Aircraft, Bombardier agrees to provide xxxxxx xxxxxx For the purposes of clarity, upon receipt by Buyer of xxxxxx and prompt notification thereof to Bombardier, subject to the completion of the second condition precedent as set forth in the following paragraph, and the receipt by Buyer of Buyer Board Approval as described below, this CCO No. 2 and CCO No. 17 to PA 350 shall be in full force and effect and shall no longer be conditional. Buyer's acceptance of the Conditional Aircraft is further conditioned upon xxxxxxx of the Conditional Aircraft, on terms satisfactory to Buyer, within xxxxxx from the date of execution of this CCO No. 2. Notice provisions will be as provided for the United Approval condition set forth above. It is understood by the parties that Buyer has the right to increase the number of firm Aircraft purchased pursuant to this CCO No. 2 by up to an additional xxxxxx Aircraft on or before December 31, 2000 on the same terms and conditions for Aircraft as set forth in this Agreement, by providing written notice to Bombardier, in which case: (i) the delivery positions for such additional firm Aircraft shall be the delivery positions for the first equivalent number of Option Aircraft as set forth in Attachment 11 hereto; (ii) Buyer shall be granted an equivalent number of new Option Aircraft pursuant to Attachment 11 such that Buyer retains a total of forty (40) Option Aircraft on the same terms and conditions as for the initial 40 Option Aircraft; (iii) the delivery positions for such new Option Aircraft shall be the delivery positions for the first equivalent number of Additional Option Aircraft as set forth in Attachment 11; and (iv) Buyer shall be granted an equivalent number of Additional Option Aircraft delivery positions pursuant to Attachment 11 commencing in xxxxxx for the Additional Option Aircraft after the above adjustments to delivery xxxxxx have occurred at the rate of xxxxxx. Should any of the Conditional Aircraft be terminated or increased as provided above, the parties will amend the Agreement as well as purchase agreement No. PA-0350 to adjust all terms for the revised number of Aircraft, using the same methodology and formulas as was utilized by CCO No. 17 to PA 350 and by this CCO No. 2. This CCO No. 2 is conditional upon Buyer receiving approval from its Board of Directors ("Buyer Board Approval") xxxxxx (the "Buyer Board Approval Date"). In the event that the Board of Directors does not approve the execution of this CCO No. 2, together with CCO No. 17 to PA 350, by the Buyer Board Approval Date, Buyer may terminate this CCO No. 2, together with CCO No. 17 to PA 350, by giving written notice to Bombardier of its intention to do so by such Buyer Board Approval Date. Should Buyer fail to notify Bombardier by the time specified above, this CCO No. 2, together with CCO No. 17 to PA 350, shall become unconditionally valid and binding. Except for the Buyer Board Approval, which is a condition precedent to this CCO No. 2 and CCO No. 17 to PA 350, Buyer will be obligated to purchase the xxxxxx, as defined in and subject to terms of purchase agreement No. PA-0454 as amended by the agreed terms of this CCO No. 2 and CCO No. 17 to PA 350. Except for the United Approval, Buyer Board Approval and Buyer reaching agreement with certain vendors as set forth above, all of which are conditions precedent to this CCO No. 2 and CCO No. 17 to PA 350, Buyer will be obligated to purchase the Conditional Aircraft subject to the terms of the Agreement as amended by the agreed terms of this CCO No. 2 and CCO No. 17 to PA 350. EXCEPT AS SET FORTH ABOVE OR IN THE ATTACHMENTS HERETO, 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:_______________ Attachment No. 1 to C.C.O. No. 2 dated August 2, 2000 ARTICLE 5 - PAYMENT x5.1 Bombardier acknowledges having previously received a deposit of xxxxxx for each of the xxxxxx Aircraft (the xxxxx Aircraft) xxxxxx, totaling xxxxxx. x5.2 Advance Payment x5.2.1 xxxxxx xx5.2.2 xxxxxx x5.2.3 In addition, Buyer shall make payment or cause payment to be made for each firm Aircraft as follows: xxxxxx x All payments referred to in paragraphs 5.2.3 (b), (c) and (d) above are to be made on the first day of the applicable month. 5.3 Payment Terms On or before the Delivery Date Bombardier shall have received in full the amount of the Aircraft Purchase Price of such Aircraft less the amount of the applicable Credit Memorandum as set out in Letter Agreement No. 1, which will be credited by Bombardier toward the Aircraft Purchase Price (said amount being the "Net Aircraft Purchase Price"). 5.4 Subject to the provisions of Article 9.9 hereof, should Buyer fail to make any of the aforementioned payments on or before the stipulated date and Buyer does not correct the default within a period of thirty (30) days thereafter, this Agreement shall automatically terminate and Bombardier shall have no further obligation to Buyer under this Agreement, including the obligation to proceed further with the manufacture of the Aircraft on behalf of Buyer or the sale and/or delivery of the Aircraft to Buyer. Bombardier shall have the option (but not the obligation) of waiving such termination should Buyer make arrangements satisfactory to Bombardier for such payment and all future payments within ten (10) calendar days of Buyer's default. APPENDIX II DELIVERY SCHEDULE First Aircraft xxxxxx xx Second Aircraft xxxxxx xx Third Aircraft xxxxxx xx Fourth Aircraft xxxxxx Fifth Aircraft xxxxxx Sixth Aircraft xxxxxx xx Seventh Aircraft xxxxxx xx Eighth Aircraft xxxxxx Ninth Aircraft xxxxxx xx Tenth Aircraft xxxxxx xx Eleventh Aircraft xxxxxx Twelfth Aircraft xxxxxx xx Thirteenth Aircraft xxxxxx Fourteenth Aircraft xxxxxx Fifteenth Aircraft xxxxxx xx Sixteenth Aircraft xxxxxx xx Seventeenth Aircraft xxxxxx xx Eighteenth Aircraft xxxxxx xx Nineteenth Aircraft xxxxxx xx Twentieth Aircraft xxxxxx xx Twenty-first Aircraft xxxxxx xx Twenty-second Aircraft xxxxxx xx Twenty-third Aircraft xxxxxx xx Twenty-fourth Aircraft xxxxxx xx Twenty-fifth Aircraft xxxxxx xx Twenty-sixth Aircraft xxxxxx xx Twenty-seventh Aircraft xxxxxx xx Twenty-eighth Aircraft xxxxxx xx Twenty-ninth Aircraft xxxxxx xx Thirtieth Aircraft xxxxxx xx Thirty-first Aircraft xxxxxx xx Thirty-second Aircraft xxxxxx xx Thirty-third Aircraft xxxxxx xx Thirty-fourth Aircraft xxxxxx xx Thirty-fifth Aircraft xxxxxx xx Thirty-sixth Aircraft xxxxxx 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 Bombardier 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 Bombardier 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 x Such assignment shall be for xxxxxx, and shall commence approximately one (1) month prior to the Delivery Date of the first Aircraft. At Buyer's request, the term shall begin upon the expiration of the term of Buyer's right to assignment of an FSR pursuant to purchase agreement No. PA-0350. 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"). TECHNICAL DATA REGIONAL JET ITEM DOC CONF MEDIUM QTY REV DEL ATA REMARKS 1. AIRCRAFT MAINTENANCE MANUAL G 1,2 xxxxxx Y PTD Y (AMM) 2. ILLUSTRATED PARTS G 1,2 xxxxxx Y PTD Y MANUAL/CATALOG (IPC) 3. STRUCTURAL REPAIR MANUAL G 1,2 xxxxxx Y PTD Y (SRM) 4. COMPONENT MAINTENANCE MANUAL G 1,2 xxxxxx Y PTD Y (CMM) 5. POWER PLANT BUILD-UP MANUAL G 1,2 xxxxxx Y PTD Y 6. WIRING DIAGRAM MANUAL C 1,2 xxxxxx Y PTD Y 7. ILLUSTRATED TOOL & EQUIPMENT G 1,2 xxxxxx Y PTD Y MANUAL (ITEM) 8. SERVICE BULLETINS G 1 xxxxxx S PTD Y SEE NOTE 2 9. NON DESTRUCTIVE TEST MANUAL G 1 xxxxxx Y PTD Y (NDT) 10. MAINTENANCE PROGRAM DOCUMENT G 1 xxxxxx S PTD Y SEE NOTE 3 (MPD) 11. FAA OR DOT AIRPLANE FLIGHT C 1 xxxxxx S ATD N MANUAL (AFM) 12. WEIGHT & BALANCE MANUAL G 1 xxxxxx Y ATD Y 13. MASTER MINIMUM EQUIPMENT LIST G 1 xxxxxx S ASAP N (MMEL) 14. QUICK REFERENCE HANDBOOK C 1 xxxxxx S ATD N 15. FLIGHT CREW OPERATING MANUAL C 1 xxxxxx S ATD N SEE NOTE 1 (FCOM) 16. MAINTENANCE TASK CARDS C 3 xxxxxx S PTD N 17. ACCESS PANELS AND G 1 xxxxxx N PTD N DOORS/COMPONENT LOCATION MANUAL 18. FLIGHT PLANNING & CRUISE G 1 xxxxxx S ASAP N CONTROL MANUAL 19. AIRCRAFT CHARACTERISTICS FOR G 1 xxxxxx N ASAP N SEE NOTE 4 AIRPORT PLANNING 20. ON-BOARD WIRING DIAGRAM BOOK C 3 xxxxxx N ATD N SEE NOTE 5 21. MAINTENANCE FACILITIES & G 1 xxxxxx S ASAP N EQUIPMENT PLANNING MANUAL 22. SYSTEM SCHEMATIC MANUAL (SSM) G 1,2 xxxxxx Y ATD Y SEE NOTE 1 23. PASSENGER INFORMATION SHEET G 3 xxxxxx S ATD N SEE NOTE 6 24. PILOT CHECKLIST C 4 xxxxxx S ATD N 25. CRASH CREW CHART G 4 xxxxxx S ATD N 26. DISPATCH DEVIATION GUIDE G 1 xxxxxx S PTD N NOTE 1:REVISION SERVICE x A. Revision services shall be available without charge for xxxxxx following the Delivery Date of Buyer's first Aircraft. Subsequent revision service shall be provided dependent upon incorporation of Bombardier issued Service Bulletins. B. Revisions to the Technical Data to reflect the Aircraft at Delivery Date shall be provided to Buyer within six (6) months following the Delivery Date of each of the Aircraft, respectively. C. Provided the revision service is being supplied under the terms of this Agreement or by subsequent purchase order, Bombardier shall incorporate in the applicable documents all applicable Bombardier originated Service Bulletins in a regular revision following formal notification by Buyer that such Service Bulletins shall be accomplished on the Buyer's Aircraft. The manuals shall then contain both original and revised configuration until Buyer advises Bombardier in writing that one configuration is no longer required. August 02, 2000 Atlantic Coast Airlines 515A Shaw Road, Dulles, Virginia, U.S.A. 20166 Gentlemen, Letter Agreement No. 001B to Purchase Agreement No. PA-0454 dated July 29, 1999 (the "Agreement" between Bombardier Inc. ("Bombardier") and Atlantic Coast Airlines ("Buyer") relating to the purchase of thirty-six (36) Canadair Regional Jet Aircraft (the "Aircraft") This Letter Agreement No. 001B dated August 02, 2000 cancels and supersedes Letter Agreement No. 001A dated September, 24, 1999. Subject: Credit Memoranda 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 In consideration of Buyer having entered into the above referenced Agreement for the purchase of thirty-six (36) Aircraft, Bombardier will issue to Buyer, upon delivery and payment of the price of the Aircraft in accordance with the Agreement, a credit memorandum in the amount of xxxxxx. 3.0 xxxxxx The credit memorandum will xxxxxx be adjusted on the same pro-rata percentage calculation as other aircraft price changes due to changes in the Specification or Buyer selected optional features as otherwise provided for in this Agreement. The credit memorandum, as adjusted, will collectively be known as the "Credit Memoranda". 4.0 In the event of the Termination of the Agreement, this Letter Agreement shall become automatically null and void with respect to any undelivered Aircraft. 5.0 The provisions of this Letter Agreement are personal to Buyer and shall not be assigned or otherwise disposed of by Buyer, except as required for financing purposes in accordance with Letter Agreement No. 004 (Financing) and except as part of an assignment of the Agreement as expressly permitted in Article 20 of the Agreement, without the prior written consent of Bombardier. 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:_____________ H. Anne Woodyatt Director, Contracts Acknowledged and Accepted Atlantic Coast Airlines ________________________ Date:_____________ Name: Title: August 2, 2000 Atlantic Coast Airlines 515A Shaw Road Dulles, Virginia, U.S.A. 20166 Gentlemen, Letter Agreement No. 002A to Purchase Agreement No. PA-0454 dated July 29, 1999 (the "Agreement" between Bombardier Inc. ("Bombardier") and Atlantic Coast Airlines ("Buyer") relating to the purchase of thirty-six (36) Canadair Regional Jet Aircraft (the "Aircraft") This Letter Agreement No. 002A dated August 02, 2000 cancels and supersedes Letter Agreement No. 002 dated July 29, 1999. 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 any or all of the Aircraft to a new corporation to be formed in the U.S. ("Newco") subject to: (i) Newco shall be a U.S. citizen and an entity in which Buyer has at the time of the assignment a controlling interest; (ii) section 1110 of the U.S. Bankruptcy Code applies; (iii) the provisions of Articles 20.1, 20.2, 20.3 of the Agreement (iv) the condition that all financings will either be the direct obligation of Buyer or guaranteed by Buyer; 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. 2.0 Subject to the satisfaction of the foregoing, the assignment pursuant to section 1.0 hereof shall then be an assignment permitted pursuant to the terms of Article 20 of the Agreement, such that Newco will be entitled to all individual Aircraft benefits and obligations as contained in the Agreement. xxxxxx 3.0 Notwithstanding the provisions of Article 20 of the Agreement, paragraph 3.0 of Letter Agreement 006, or any other terms of the Agreement or any Letter Agreement limiting the right to Assignment, Buyer shall have the right to assign its right to purchase and to lease any or all of the Aircraft, and all rights pertaining thereto pursuant to this Agreement, and/or may sell any of the Aircraft or assign the leases of any of the Aircraft, to Atlantic Coast Jet, Inc. a Delaware corporation ("ACJet"). ACJet, as assignee, will be entitled to all individual Aircraft benefits and obligations as contained in this Agreement including all Letter Agreements, and Buyer shall have no further claim with respect to such assigned benefits. The assignment of an Aircraft fleet benefits is approved, provided that ACJet is a wholly owned subsidiary or affiliate of Buyer at the time of assignment, and provided that if the liabilities of Bombardier are increased as a result of ACJet operating any of the Aircraft separate from Buyer, appropriate adjustments will be made as mutually agreed by the parties on a case by case basis. In the event that in the future ACJet ceases to be a wholly owned subsidiary or affiliate of Buyer, ongoing rights and obligations under Aircraft fleet benefits and obligations will be mutually agreed by the parties on a case by case basis, xxxxxx 4.0 Notwithstanding the provisions of Article 20 of the Agreement, paragraph 3.0 of Letter Agreement 006, or any other terms of the Agreement or any Letter Agreement limiting the right to Assignment, Buyer shall have the right to assign its right to purchase and to lease any or all of the Aircraft, and all rights pertaining thereto pursuant to this Agreement, and/or may sell any of the Aircraft or assign the leases of any of the Aircraft, to xxxxxx Any of such assignees will be entitled to all individual Aircraft benefits and obligations as contained in this Agreement including all Letter Agreements, and Buyer shall have no further claim with respect to such assigned benefits and obligations. xxxxxx, the assignability or the extent thereof of any Aircraft fleet benefits and obligations or total transaction concessions provided to Buyer pursuant to the Agreement, will be mutually agreed by the parties on a case by case basis. 5.0 In the event of the termination of the Agreement, this Letter Agreement shall become automatically null and void with respect to any undelivered Aircraft. 6.0 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 very truly, BOMBARDIER INC. H. Anne Woodyatt Director, Contracts Acknowledged and Accepted Atlantic Coast Airlines Kerry B. Skeen President & C.E.O. July 29, 1999 Atlantic Coast Airlines 515A Shaw Road, Sterling, Virginia, U.S.A. 20166 Gentlemen, x Letter Agreement No. 004 to Purchase Agreement No. PA-0454 dated July 29, 1999 (the "Agreement") between Bombardier Inc. ("Bombardier") and Atlantic Coast Airlines ("Buyer") relating to the purchase of thirty-six (36) Canadair Regional Jet Aircraft (the "Aircraft") Subject: Financing 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. 1.1 This Letter Agreement describes the general terms and conditions of the financing assistance to be provided by Bombardier to Buyer. xxxxxx 2.3 xxxxxx 3.0 xxxxxx x4.0 xxxxxx 5.0 In the event of the termination of the Agreement pursuant to Article 16.1 or 16.2 as a result of a default or breach of this Agreement by Buyer, this Letter Agreement shall become automatically null and void with respect to any undelivered Aircraft. 6.0 The provisions of this Letter Agreement are personal to Buyer and shall not be assigned or otherwise disposed of by Buyer except as part of an assignment of the Agreement expressly permitted by Article 20 of the Agreement. xxxxxx 5.0 The provisions of this Letter Agreement are personal to Buyer and shall not be assigned or otherwise disposed of by Buyer except as part of an assignment of the Agreement expressly permitted by Article 20 of the Agreement. 6.0 This Letter Agreement constitutes an integral part of the Agreement and subject to the terms and conditions contained therein. x 7.0 In the event of the Termination of the Agreement, this Letter Agreement shall become automatically null and void with respect to undelivered Aircraft. Attachment No. 9 to C.C.O. No. 2 dated August 2, 2000 Letter Agreement 006 Spares Credit xx 3.0 In consideration of Buyer having entered into the above referenced Agreement, Bombardier will issue to Buyer, upon delivery and payment of the price of each of the Aircraft in accordance with the Agreement, a xxxxxx credit memorandum in the amount of xxxxxx (the "Additional xxxxxx Credit Memorandum"). No adjustment in the Credit Memorandum as identified in Letter Agreement No. 1 will be made in exchange for the issuance of this Additional xxxxxx Credit Memorandum. xxxxxx x 4.0 The provisions of this Letter Agreement are personal to Buyer and shall not be assigned or otherwise disposed of by Buyer except as part of an assignment of the Agreement expressly permitted in Article 20 of the Agreement. x 5.0 This Letter Agreement constitutes an integral part of the Agreement and subject to the terms and conditions contained therein. x 6.0 In the event of the Termination of the Agreement, this Letter Agreement shall become automatically null and void with respect to any undelivered Aircraft. 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:_____________ Michel Bourgeois Vice President, Contracts Acknowledged and Accepted Atlantic Coast Airlines ________________________ Date:_____________ Kerry B. Skeen President & C.E.O. Attachment No. 10 to C.C.O. No. 2 dated August 2, 2000 Letter Agreement 009 Reconciliation x xxxxxx x3.0 xxxxxx 4.0 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. 5.0 The provisions of this Letter Agreement are personal to Buyer and shall not be assigned or otherwise disposed of by Buyer except as part of an assignment of the Agreement (in whole not in part) expressly permitted under Article 20 of the Agreement and otherwise such consent shall not be unreasonably withheld. 6.0 In the event of the Termination of the Agreement, this Letter Agreement shall become automatically null and void with respect to any undelivered Aircraft. August 02, 2000 Atlantic Coast Airlines 515A Shaw Road, Sterling, Virginia, U.S.A. 20166 Gentlemen, Letter Agreement No. 012 to Purchase Agreement No. PA-0454 dated July 29, 1999 (the "Agreement"), as amended, between Bombardier Inc. ("Bombardier") and Atlantic Coast Airlines ("Buyer") relating to the purchase of thirty-six (36) Canadair Regional Jet Aircraft (the "Aircraft") Subject: Additional Option Aircraft 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 In consideration of Buyer having entered into the above referenced Agreement, Bombardier will grant to Buyer the right to purchase forty (40) Aircraft (the "Option Aircraft") in accordance with the following general conditions: (a) Number of Option Aircraft The Scheduled Delivery Dates of the Option Aircraft are follows: xxxxxx N.B. Notwithstanding the Delivery Schedule, as amended, prior to CCO No. 2 becoming a firm agreement for the Conditional Aircraft, Bombardier agrees to provide xxxxxx delivery positions for the Option Aircraft in xxxxxxx,with a corresponding reduction in delivery positions for the Option Aircraft xxxxxx and a corresponding advancement of xxxxxxx Option Aircraft delivery positions. (b) Terms (i) The Option Aircraft will be as described in Article 2 of the Agreement. (ii) (a) The base price for each of the Option Aircraft (excluding the Buyer Selected Optional Features) Ex Works (Incoterms 1990) Bombardier's offices or premises in Montreal, Province of Quebec, Canada, is xxxxxx (b) The base price of the Buyer Selected Optional Features is xxxxxx The Option Aircraft base price shall be the base price for the Option Aircraft as stated in paragraph (b)(ii)(a) above, plus the base price of the Buyer Selected Optional Features as stated in paragraph (b)(ii)(b) above (the "Option Aircraft Base Price"). The price of the Option Aircraft (the "Option Aircraft Purchase Price") shall be the Option Aircraft Base Price adjusted to xxxxxx (iii) As consideration for this option, Buyer shall make or cause to make payment to Bombardier xxxxxx per Option Aircraft (the "Option Deposit") upon execution of CCO No. 2, for a total amount of xxxxxx The amount of xxxxxx. (iv) Unless expressly provided for in the Agreement, the terms and conditions of the Agreement (including Letter Agreements, except as noted below) shall apply mutatis mutandis to the Option Aircraft, with the exception that the provisions with respect to Annex A training courses as specified in Article 3.2.4 of the Agreement (Flight Attendant Courses), shall not apply to the Option Aircraft. (v) The following Letter Agreement shall not apply to the Option Aircraft and is hereby excluded: Letter Agreement No. 012 (Additional Option Aircraft) (vi) Letter Agreement No. 008A (Schedule Completion Rate), Letter Agreement No. 009E (Airframe Direct Maintenance Cost) and Letter Agreement No. 006 (Operational Restrictions) of purchase agreement no. RJ-0350 dated January 8, 1997, as amended through CCO No. 17 to such purchase agreement, shall apply mutatis mutandis to the Option Aircraft, with specific terms for Option Aircraft as set out therein. (vii) Option Aircraft will receive pricing and credit memoranda as provided for the Aircraft, including the credit memoranda specified in paragraph 2.0 of Letter Agreement No. 001B (Credit Memoranda), and the Additional xxxxxx Credit Memorandum specified in paragraph 3.0 of Letter Agreement 006 (Spares Credit). (c) Option Aircraft Payment Terms Terms of payment for each of the Option Aircraft shall be as set forth for the Aircraft in Article 5.2 of the Agreement as amended by CCO No. 2 (and attached thereto as Attachment 1) with the exception that the xxxxxx payments required pursuant to Article 5.2.3 (a) and (b) with respect to the firm Aircraft shall be paid by Buyer for each of the Option Aircraft xxxxxx the Scheduled Delivery Date of the applicable Aircraft . (d) Exercise Procedures Timing and procedures for the exercise of Option Aircraft shall be as follows: (i) The Option Aircraft will be exercised as individual aircraft, with Buyer providing written notice of its intention to do so ("Notice of Intention") xxxxxx the first day of the month of the Scheduled Delivery Date of the applicable Option Aircraft, at which point the Option Deposit for the applicable Option Aircraft will become non-refundable, and a definitive irrevocable, written exercise xxxxxx the first day of the month of the Scheduled Delivery Date of the applicable Option Aircraft. (ii) Additional Option Aircraft. Upon receipt of Buyer's definitive irrevocable written exercise of any Option Aircraft or Buyer's failure to exercise an Option Aircraft at the required time, Buyer shall be granted a right to purchase an additional Option Aircraft (an "Additional Option Aircraft"), the xxxxxx of which will have delivery positions at the rate of xxxxxx commencing in the xxxxxx of the Option Aircraft, as may have been adjusted. The subsequent Additional Option Aircraft will have delivery positions to be provided by Bombardier subject to availability taking into account Bombardier's then production rate and commitments. The terms and conditions for the Additional Option Aircraft will be the same as those for the Option Aircraft with the following exceptions: xxxxxx 3.0 Bombardier will, upon payment for and delivery of each Option Aircraft, xxxxxx, extend the term of Article 1.2.2 of Annex A of the Agreement (the Field Service Representative ("FSR")) by xxxxxx. 4.0 In the event of the Termination of the Agreement, this Letter Agreement shall become automatically null and void. 5.0 Upon exercise of Buyer's rights to purchase in accordance with this Letter Agreement, the parties shall amend the Agreement or enter into an additional purchase agreement in order to give effect to the purchase of Option Aircraft or Additional Option Aircraft in accordance with the terms and conditions hereof. 7.0 The provisions of this Letter Agreement are personal to Buyer and, except as part of an assignment of the Agreement as expressly permitted by the provisions in Article 20 of the Agreement, shall not be assigned or otherwise disposed of by Buyer without the prior written consent of Bombardier. 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:_____________ H. Anne Woodyatt Director, 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.: PA-0454 (the "Agreement") AIRCRAFT TYPE: CRJ C.C.O. NO.: 3 DATED: December 6, 2000 PAGES: 8 REASON FOR CHANGE To amend the Agreement to provide Buyer with a revised Option Aircraft delivery schedule and a new rate for delivery of the Additional Option Aircraft. PAGES TO BE SUBSTITUTED NEW/REVISED PAGES Letter Agreement No. 012A Attachment No. 1 to CCO No. 3 DESCRIPTION OF CHANGE: Letter Agreement No. 012A - (Additional Option Aircraft) Letter Agreement No. 012 is hereby deleted and replaced in its entirety by Letter Agreement No.012A to (i) provide Buyer with a revised Option Aircraft delivery schedule for the forty (40) Option Aircraft by adding xxxxxx, (ii) xxxxxx, and (iii) xxxxxx EXCEPT AS SET FORTH ABOVE OR IN THE ATTACHMENTS HERETO, 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: "Scott Preece" Signed: "Richard Kennedy" Scott Preece Name: Richard Kennedy Manager, Contracts Title: Vice President, General Counsel & Secretary Date: December 6, 2000 Date: December 6, 2000 December 6, 2000 Atlantic Coast Airlines 515A Shaw Road, Sterling, Virginia, U.S.A. 20166 Gentlemen, Letter Agreement No. 012A to Purchase Agreement No. PA-0454 dated July 29, 1999 (the "Agreement"), as amended, between Bombardier Inc. ("Bombardier") and Atlantic Coast Airlines ("Buyer") relating to the purchase of thirty-six (36) Canadair Regional Jet Aircraft (the "Aircraft") This Letter Agreement No. 012A dated December 6, 2000 cancels and supersedes Letter Agreement No. 012 dated August 2, 2000. Subject: Additional Option Aircraft 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 In consideration of Buyer having entered into the above referenced Agreement, Bombardier will grant to Buyer the right to purchase forty (40) additional Aircraft (the "Option Aircraft") in accordance with the following general conditions: (a) Number of Option Aircraft The Scheduled Delivery Dates of the Option Aircraft are follows: xxxxxx (b) Terms (i) The Option Aircraft will be as described in Article 2 of the Agreement. (ii) (a) The base price for each of the Option Aircraft (excluding the Buyer Selected Optional Features) Ex Works (Incoterms 1990) Bombardier's offices or premises in Montreal, Province of Quebec, Canada, is xxxxxx . (b) The base price of the Buyer Selected Optional Features is xxxxxx The Option Aircraft base price shall be the base price for the Option Aircraft as stated in paragraph (b)(ii)(a) above, plus the base price of the Buyer Selected Optional Features as stated in paragraph (b)(ii)(b) above (the "Option Aircraft Base Price"). The price of the Option Aircraft (the "Option Aircraft Purchase Price") shall be the Option Aircraft Base Price adjusted to xxxxxx (iii) As consideration for this option, Buyer shall make or cause to make payment to Bombardier xxxxxx per Option Aircraft (the "Option Deposit") upon execution of CCO NO. 2, for a total amount of xxxxxx. The amount of xxxxxx (iv) Unless expressly provided for in the Agreement, the terms and conditions of the Agreement (including Letter Agreements, except as noted below) shall apply mutatis mutandis to the Option Aircraft, with the exception that the provisions with respect to Annex A training courses as specified in Article 3.2.4 of the Agreement (Flight Attendant Courses), shall not apply to the Option Aircraft. (v) The following Letter Agreement shall not apply to the Option Aircraft and is hereby excluded: Letter Agreement No. 012 (Additional Option Aircraft) (vi) Letter Agreement No. 008A (Schedule Completion Rate), Letter Agreement No. 009E (Airframe Direct Maintenance Cost) and Letter Agreement No. 006 (Operational Restrictions) of purchase agreement no. RJ-0350 dated January 8, 1997, as amended through CCO No. 17 to such purchase agreement, shall apply mutatis mutandis to the Option Aircraft, with specific terms for Option Aircraft as set out therein. (viii) Option Aircraft will receive pricing and credit memoranda as provided for the Aircraft, including the credit memoranda specified in paragraph 2.0 of Letter Agreement No. 001B (Credit Memoranda), and the Additional xxxxxx Credit Memorandum specified in paragraph 3.0 of Letter Agreement 006 (Spares Credit). (c) Option Aircraft Payment Terms Terms of payment for each of the Option Aircraft shall be as set forth for the Aircraft in Article 5.2 of the Agreement as amended by CCO No. 2 (and attached thereto as Attachment 1) with the exception that the xxxxxx payments required pursuant to Article 5.2.3 (a) and (b) with respect to the firm Aircraft shall be paid by Buyer for each of the Option Aircraft xxxxxx the Scheduled Delivery Date of the applicable Aircraft . (d) Exercise Procedures Timing and procedures for the exercise of Option Aircraft shall be as follows: (ii) The Option Aircraft will be exercised as individual aircraft, with Buyer providing written notice of its intention to do so ("Notice of Intention") xxxxxx the first day of the month of the Scheduled Delivery Date of the applicable Option Aircraft, at which point the Option Deposit for the applicable Option Aircraft will become non-refundable, and a definitive irrevocable, written exercise xxxxxx the first day of the month of the Scheduled Delivery Date of the applicable Option Aircraft. (ii) Additional Option Aircraft. Upon receipt of Buyer's definitive irrevocable written exercise of any Option Aircraft or Buyer's failure to exercise an Option Aircraft at the required time, Buyer shall be granted a right to purchase an additional Option Aircraft (an "Additional Option Aircraft"), xxxxxx of which will have delivery positions commencing in the xxxxx The subsequent Additional Option Aircraft will have delivery positions to be provided by Bombardier subject to availability taking into account Bombardier's then production rate and commitments. The terms and conditions for the Additional Option Aircraft will be the same as those for the Option Aircraft with the following exceptions: xxxxxx 3.0 Bombardier will, upon payment for and delivery of each Option Aircraft, xxxxxx, extend the term of Article 1.2.2 of Annex A of the Agreement (the Field Service Representative ("FSR")) by xxxxxx 4.0 In the event of the Termination of the Agreement, this Letter Agreement shall become automatically null and void. 5.0 Upon exercise of Buyer's rights to purchase in accordance with this Letter Agreement, the parties shall amend the Agreement or enter into an additional purchase agreement in order to give effect to the purchase of Option Aircraft or Additional Option Aircraft in accordance with the terms and conditions hereof. 6.0 The provisions of this Letter Agreement are personal to Buyer and, except as part of an assignment of the Agreement as expressly permitted by the provisions in Article 20 of the Agreement, shall not be assigned or otherwise disposed of by Buyer without the prior written consent of Bombardier. 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. "Scott Preece" Date: December 6, 2000 Scott Preece Manager, Contracts Acknowledged and Accepted ATLANTIC COAST AIRLINES "Richard Kennedy" Date: December 6, 2000 Name: Richard Kennedy Title: Vice President, General Counsel and Secretary CONTRACT CHANGE ORDER PURCHASER: Atlantic Coast Airlines PURCHASE AGREEMENT NO.: PA-0454 (the "Agreement") AIRCRAFT TYPE: CRJ C.C.O. NO.: 4 DATED: November 7, 2001 PAGES: 3 REASON FOR CHANGE: To amend the Agreement to (i) add Paint Scheme - ACA - United Express, G1 Galley - Stowable Work Shelf, and FMS - Single, ACARS Compatible (Collins FMS-4200) to the list of Buyer Selected Optional Features, and (ii) delete Paint Scheme and FMS - Single Collins FMS 4200 from the list of Buyer Selected Optional Features. PAGES TO BE SUBSTITUTED: NEW/REVISED PAGES: Purchase Agreement, page 54 Attachment No. 1 to CCO No. 4 DESCRIPTION OF CHANGE: P.A., page 54 - Appendix IV (Buyer Selected Optional Features) The Buyer Selected Optional Features are amended by: (i) deleting CR Ref. N 11-300 (Paint Scheme) and replacing it with CR Ref. N 25-060 (Paint Scheme - ACA - United Express) xxxxxx, (ii) replacing CR Ref. N 25-31-320 with CR Ref. N 25-31-301, (iii) adding CR Ref. N 25-31- 306 (G1 Galley - Stowable Work Shelf) xxxxxx, and (iv) deleting CR Ref. N 34-330 (FMS - Single Collins FMS-4200) and replacing it with CR Ref. N 34-335 (FMS - Single, ACARS Compatible (Collins FMS-4200)) xxxxxx. EXCEPT AS SET FORTH ABOVE OR IN THE ATTACHMENTS HERETO, 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: "Scott Preece" Signed: "Richard Kennedy" Scott Preece Name: Richard J. Kennedy Manager, Contracts Title: Vice President and Secretary Date: November 7, 2001 Date: November 15, 2001 APPENDIX IV BUYER SELECTED OPTIONAL FEATURES CS : A7553 Bx Option Description Price in CR Ref. N Jan 1999 US Dollars 00-008 PERFORMANCE - EXTENDED RANGE xxxxxx 00-312 ADDITIONAL FLAP SETTING, 8 DEG TAKE-OFF xxxxxx 00-313 CERTIFICATION - FAA STRAPPING xxxxxx 25-060 PAINT SCHEME - ACA - UNITED EXPRESS xx xxxxxx x 25-22-301 IN-ARM MEAL TRAYS IN ROW 1 xxxxxx 25-22-302 UNDERSEAT LIFE VEST POUCHES xxxxxx 25-22-304 RECLINING PASSENGER SEATS xxxxxx 25-24-301 ENTRANCE STORAGE COMPARTMENT xxxxxx 25-26-301 PARTITION - LHD WINDSCREEN xxxxxx 25-26-302 PARTITION - RHD WINDSCREEN xxxxxx 25-31-301 G1 GALLEY: PROVISIONS FOR SNACK & HOT xxxxxx x BEVERAGE SERVICE 25-31-306 G1 GALLEY - STOWABLE WORK SHELF xxxxxx xxx 25-34-310 STANDARD BEVERAGE MAKER - COFFEE (QTY 2) xxxxxx 30-001 ICE DETECTION - RED WARNING LIGHT xxxxxx 31-320 EICAS 2000 xxxxxx 31-340 DFDR 88 PARAMETERS xxxxxx 33-003 RED BEACON LIGHTS xxxxxx 33-310 TAIL LOGO LIGHTS xxxxxx 33-320 CARGO DOOR FLOODLIGHTS xxxxxx 34-328 EGPWS - ENHANCED GROUND PROXIMITY WARNING xxxxxx SYSTEM 34-335 FMS - SINGLE, ACARS COMPATIBLE (COLLINS FMS- xxxxxx x 4200) 34-350 GPS - SINGLE COLLINS GPS-4000 xxxxxx 34-353 VHF NAV - FM IMMUNITY (VIR-432+) xxxxxx 34-362 ALTIMETER - BARO SETTING REMINDER xxxxxx 35-004 EROS MAGIC MASK (THREE) xxxxxx 38-313 8 US GAL. GALLEY WATER/WASTE TANK SYSTEM xxxxxx (WITH G1 GALLEY SELECTION) AMI PILOT & CO-PILOT SEAT xxxxxx Total Technical Features xxxxxx xxxxx All prices listed above are expressed in January 1, 1999 US dollars, and are subject to economic adjustment to the date of aircraft delivery as provided in the Agreement. CONTRACT CHANGE ORDER PURCHASER: Atlantic Coast Airlines PURCHASE AGREEMENT NO.: PA-0454 (the "Agreement") AIRCRAFT TYPE: CRJ-200 C.C.O. NO.: 5 DATED: December 20, 2001 PAGES: 15 REASON FOR CHANGE To amend the Agreement by (i) revising the Delivery Schedule and (ii) introducing Letter Agreement No. 013 to provide amended terms and conditions relating to the xxxxxx built aircraft bearing manufacturer serial numbers xxxxxx and xxxxx being the xxxxxx to be delivered under the Agreement (the "Built Aircraft") which are referenced in the proposal letter dated December 20, 2001 executed by Buyer and Bombardier. PAGES TO BE SUBSTITUTED NEW/REVISED PAGES Purchase Agreement page 52 Attachment No. 1 to CCO No. 5 Purchase Agreement pages C-23 and C-24 Attachment No. 2 to CCO No. 5 Letter Agreement No. 013 Attachment No. 3 to CCO No. 5 DESCRIPTION OF CHANGE: P.A. Page 52 - Appendix II (Delivery Schedule) Appendix II (Delivery Schedule) is deleted in its entirety and replaced by Attachment No. 1 hereto. P.A. Pages C-23 and C-24 - Attachment A (List of Technical Data, Column Heading Explanation of Codes and Technical Data) The definition of ATD found in Item 6 is amended by deleting the word "first" and replacing it with the word "second". In addition, the definition of PTD found in Item 6 is amended by deleting the words "each or the first" and replacing them with the words "the second or each subsequent". The last sentence on page C-23 is amended by deleting the word "first" from the first line and replacing it with the word "second". Note 1: A. is amended by deleting the word "first" from the second line and replacing with the word "second". Letter Agreement No. 013 - (Built Aircraft) Letter Agreement No. 013 is introduced to provide amended terms and conditions relating to the Built Aircraft and is set forth in Attachment No. 2 hereto. This CCO No. 5 is conditional upon Buyer executing CCO No. 19 to Purchase Agreement No. 0350 failing which this CCO shall become null and void. EXCEPT AS SET FORTH ABOVE OR IN THE ATTACHMENTS HERETO, 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: "Scott Preece" Signed: "Rick Kennedy" Date: December 20, 2001 Date: December 21, 2001 APPENDIX II DELIVERY SCHEDULE First Aircraft xxxxxx Second Aircraft xxxxxx Third Aircraft xxxxxx Fourth Aircraft xxxxxx Fifth Aircraft xxxxxx Sixth Aircraft xxxxxx Seventh Aircraft xxxxxx Eighth Aircraft xxxxxx Ninth Aircraft xxxxxx Tenth Aircraft xxxxxx Eleventh Aircraft xxxxxx Twelfth Aircraft xxxxxx Thirteenth Aircraft xxxxxx Fourteenth Aircraft xxxxxx Fifteenth Aircraft xxxxxx Sixteenth Aircraft xxxxxx Seventeenth Aircraft xxxxxx Eighteenth Aircraft xxxxxx Nineteenth Aircraft xxxxxx Twentieth Aircraft xxxxxx Twenty-first Aircraft xxxxxx Twenty-second Aircraft xxxxxx Twenty-third Aircraft xxxxxx Twenty-fourth Aircraft xxxxxx Twenty-fifth Aircraft xxxxxx Twenty-sixth Aircraft xxxxxx Twenty-seventh Aircraft xxxxxx Twenty-eighth Aircraft xxxxxx Twenty-ninth Aircraft xxxxxx Thirtieth Aircraft xxxxxx Thirty-first Aircraft xxxxxx Thirty-second Aircraft xxxxxx Thirty-third Aircraft xxxxxx Thirty-fourth Aircraft xxxxxx Thirty-fifth Aircraft xxxxxx Thirty-sixth Aircraft xxxxxx ATTACHMENT A LIST OF TECHNICAL DATA COLUMN HEADING EXPLANATION OF CODES ITEM 1 DOC DOCUMENT Title of Technical Data provided. 2 CONFIG CONFIGURATION G = Contains data common to all aircraft of the same type (Generic). C = Contains data unique to Buyer's Aircraft (Customized). 3 MEDIUM Buyer selects one of the following media specified in the table: 1 = Print two sides 2 = Microfilm 3 = Print one side 4 = Laminated Cardboard 4 REVISION Y = Periodic revision service applies N = Revision service not applicable S = Revised as required by Bombardier 5 QUANTITY (Number) = Quantity per the Agreement (Number) PER = Quantity per Aircraft 6 DELIVERY x ATD = At time of the Delivery Date of the second Aircraft. x PTD = Prior to the Delivery Date of the second or each subsequent Aircraft (as applicable). 7 ATA Y = Document is per ATA Specification 100, Revision 26. N = Document is to Bombardier's existing commercial practices. x With the delivery of the second Aircraft, Bombardier will provide to Buyer at no additional charge one set of the technical manuals listed below TECHNICAL DATA REGIONAL JET ITEM DOC CONF MEDIUM QTY REV DEL ATA REMARKS 1. AIRCRAFT MAINTENANCE MANUAL G 1,2 xxxxxx Y PTD Y (AMM) 2. ILLUSTRATED PARTS G 1,2 xxxxxx Y PTD Y MANUAL/CATALOG (IPC) 3. STRUCTURAL REPAIR MANUAL G 1,2 xxxxxx Y PTD Y (SRM) 4. COMPONENT MAINTENANCE MANUAL G 1,2 xxxxxx Y PTD Y (CMM) 5. POWER PLANT BUILD-UP MANUAL G 1,2 xxxxxx Y PTD Y 6. WIRING DIAGRAM MANUAL C 1,2 xxxxxx Y PTD Y 7. ILLUSTRATED TOOL & EQUIPMENT G 1,2 xxxxxx Y PTD Y MANUAL (ITEM) 8. SERVICE BULLETINS G 1 xxxxxx S PTD Y SEE NOTE 2 9. NON DESTRUCTIVE TEST MANUAL G 1 xxxxxx Y PTD Y 10. MAINTENANCE PROGRAM DOCUMENT G 1 xxxxxx S PTD Y SEE NOTE 3 (MPD) 11. FAA OR DOT AIRPLANE FLIGHT C 1 xxxxxx S ATD N MANUAL (AFM) 12. WEIGHT & BALANCE MANUAL G 1 xxxxxx Y ATD Y 13. MASTER MINIMUM EQUIPMENT LIST G 1 xxxxxx S ASAP N (MMEL) 14. QUICK REFERENCE HANDBOOK C 1 xxxxxx S ATD N 15. FLIGHT CREW OPERATING MANUAL C 1 xxxxxx S ATD N SEE NOTE 1 (FCOM) 16. MAINTENANCE TASK CARDS C 3 xxxxxx S PTD N 17. ACCESS PANELS AND G 1 xxxxxx N PTD N DOORS/COMPONENT LOCATION MANUAL 18. FLIGHT PLANNING & CRUISE G 1 xxxxxx S ASAP N CONTROL MANUAL 19. AIRCRAFT CHARACTERISTICS FOR G 1 xxxxxx N ASAP N SEE NOTE 4 AIRPORT PLANNING 20. ON-BOARD WIRING DIAGRAM BOOK C 3 xxxxxx N ATD N SEE NOTE 5 21. MAINTENANCE FACILITIES & G 1 xxxxxx S ASAP N EQUIPMENT PLANNING MANUAL 22. SYSTEM SCHEMATIC MANUAL (SSM) G 1,2 xxxxxx Y ATD Y SEE NOTE 1 23. PASSENGER INFORMATION SHEET G 3 xxxxxx S ATD N SEE NOTE 6 24. PILOT CHECKLIST C 4 xxxxxx S ATD N 25. CRASH CREW CHART G 4 xxxxxx S ATD N 26. DISPATCH DEVIATION GUIDE G 1 xxxxxx S PTD N NOTE 1:REVISION SERVICE x A. Revision services shall be available without charge for xxxxxx following the Delivery Date of Buyer's second Aircraft. Subsequent revision service shall be provided dependent upon incorporation of Bombardier issued Service Bulletins. B. Revisions to the Technical Data to reflect the Aircraft at Delivery Date shall be provided to Buyer within six (6) months following the Delivery Date of each of the Aircraft, respectively. C. Provided the revision service is being supplied under the terms of this Agreement or by subsequent purchase order, Bombardier shall incorporate in the applicable documents all applicable Bombardier originated Service Bulletins in a regular revision following formal notification by Buyer that such Service Bulletins shall be accomplished on the Buyer's Aircraft. The manuals shall then contain both original and revised configuration until Buyer advises Bombardier in writing that one configuration is no longer required. December 20, 2001 Atlantic Coast Airlines 45200 Business Court S.100, Dulles, Virginia, U.S.A. 20166 Gentlemen, Letter Agreement No. 013 to Purchase Agreement No. PA-0454 dated July 29, 1999 (the "Agreement"), as amended, between Bombardier Inc. ("Bombardier") and Atlantic Coast Airlines ("Buyer") relating to the purchase of thirty-six (36) Canadair Regional Jet Aircraft (the "Aircraft") Subject: Built Aircraft 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 In consideration of Buyer having entered into the above referenced Agreement, and further to Buyer and Bombardier executing the proposal letter dated December 20, 2001 which includes the replacement of xxxxxx built aircraft bearing manufacturer serial numbers xxxxxxand xxxxxx ("Built Aircraft") for xxxxxx Aircraft under the Agreement, these Built Aircraft becoming the xxxxxx under the Agreement, the parties agree that the terms and conditions of the Agreement shall apply to the Built Aircraft and all references to Aircraft shall include the Built Aircraft, save and except for the amendments set forth below which shall only apply with respect to the Built Aircraft: (i) P.A. Page 8 - Article 2 (Subject Matter of Sale) The first paragraph of Article 2 is amended by (i) deleting the words "xxxxxx dated xxxxxx attached hereto as Appendix III" from the third and fourth lines and replacing them with the words "xxxxxxx dated xxxxxx, attached to Contract Change Order No. 5 as Annex No. 1 to Attachment No. 1" and (ii) deleting the words "Appendix IV hereto" from the seventh line and replacing them with the words "Annex Nos. 2 and 3 to Attachment No. 1 to Contract Change Order No. 5 with respect to the First Aircraft and Second Aircraft respectively". The second paragraph shall not apply to the Built Aircraft. (ii) P.A. Page 10 - Article 4 (Price) Article 4.1 (b) is amended by deleting the words "is xxxxxx " and replacing them with the words "for the xxxxxx is xxxxxx". Article 4.3.2 is amended by adding the words "and xxxxxx Article 4.3.3 is amended by adding the words xxxxxx (iii) P.A. Page 27 - Article 13 (Excusable Delay) Article 13.2 (b) is amended by adding the words xxxxxx (iv) P.A. Page 14.2 (Non-Excusable Delay) Article 14.2 is amended by adding the words xxxxxx (v) P.A. Page 53 - APPENDIX III (Specification) Appendix III is deleted in its entirety and replaced by the following: TYPE SPECIFICATION xxxxxx (vi) P.A. Page 54 - APPENDIX IV (Buyer Selected Optional Features) Appendix IV is deleted in its entirety and replaced by Annex Nos. 2 and 3 hereto with respect to the xxxxxx. (vii) P.A. Page C-24 - ANNEX A (Technical Data, Regional Jet) Bombardier will deliver to Buyer the FAA or DOT Airplane Flight Manual, Flight Crew Operating Manual and Quick Reference Handbook at the time of delivery of each Built Aircraft and the Illustrated Parts Manual/Catalog, Wiring Diagram Manual and Weight & Balance Manual as completed for the original intended customer, at the time of respective Built Aircraft delivery. Bombardier will update and deliver the revisions to the manuals via the normal revision cycle. The manuals will be revised to Buyer's original Aircraft Specification at delivery (RAD-601R-146 Issue B dated June 11, 1999 and Buyer Selected Optional Features). The above referenced manuals are included in the quantity referenced in the Technical Data set forth in Annex A to the Agreement. (viii) P.A. Page C-31 - ANNEX B (Vendor Warranties) Article 2.2 is amended by adding the words "and shall commence from the date of delivery of the Built Aircraft" at the end of the paragraph. (ix) Letter Agreement No. 001B - Credit Memoranda The title is amended by adding the words "and xxxxxx Article 2.0 of Letter Agreement No. 001B is amended by deleting the words xxxxxx for each Aircraft" from the xxxxxx and replacing them with the words "xxxxxfor the xxxxxx". Article 4.0 and 5.0 are amended by renumbering them Articles 5.0 and 6.0. A new Article 4.0 is inserted as follows: 4.0 In consideration of Buyer having entered into the proposal letter dated December 20, 2001, Bombardier will issue to Buyer, upon delivery and payment of the price of the Built Aircraft in accordance with the Agreement, a credit memorandum in the amount of xxxxxx xxxxxx The credit memorandum, as adjusted, will collectively be known as the xxxxxx (x) Letter Agreement No. 006 - xxxxxx Credit Article 3.0 of Letter Agreement No. 006 shall not apply to the Built Aircraft. (xi) Letter Agreement No. 009 (Reconciliation) Article 3.0 is amended by adding the words "xxxxxx. 3.0 The provisions of this Letter Agreement are personal to Buyer and, except as part of an assignment of the Agreement as expressly permitted by the provisions in Article 20 of the Agreement, shall not be assigned or otherwise disposed of by Buyer without the prior written consent of Bombardier. 4.0 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. "Scott Preece" Scott Preece Date: December 20, 2001 Manager, Contracts Acknowledged and Accepted ATLANTIC COAST AIRLINES "Rick Kennedy" Name: Richard Kennedy Date: December 21, 2001 Title: Vice President, General Counsel and Secretary Annex No. 1 to Letter Agreement No. 013 SPECIFICATION TYPE SPECIFICATION xxxxxx Annex No. 2 to Letter Agreement No. 013 APPENDIX IV BUYER SELECTED OPTIONAL FEATURES FOR FIRST AIRCRAFT CS: ACA7553-B CR Ref. N Option Description Price in Jan 1999 US Dollars 00-008 Performance - Extended Range 00-312 Additional Flap Setting, 8 Deg Take-Off 00-313 Certification - FAA Strapping 21-309 Ground Air Conditioning Connection 23-331 VHF Comm Third Radio Complete Provisions 23-350 Selcal System 25-083 Paint Scheme - Midway 25-22-301 In-Arm Meal Tables At Front Row 25-22-302 Underseat Life Vest Pouches 25-22-303 Leather Passenger Seat Dress Covers, 50 Seats 25-22-304 Reclining Passenger Seats 25-23-301 Second Flight Attendant Fold-Down Seat (With Hand-Set / Intercom) 25-24-301 Entrance Storage Compartment 25-26-301 Partition - LHD Windscreen 25-26-302 Partition - RHD Windscreen 25-31-301 G1 Galley: Provisions For Snack And Hot Beverage Service (Prov. 2 Carts) 25-31-306 G1 Galley: Storable Work Shelf 25-320x Interior Cabin - Midway 25-34-310 Atlas Standard Beverage Maker - Coffee (Qty 2) 25-61-3XX Emergency Equipment - Midway - Type Spec 25-62-301 Third Oxygen Mask In Lhs Psu 30-001 Ice Detection - Red Warning Light 31-340 FDR - 128 WPS DFDR (L3Comm) 33-003 Red Beacon Lights 33-310 Tail Logo Flood Lights BUYER SELECTED OPTIONAL FEATURES FOR FIRST AIRCRAFT - CONTINUED CS: ACA7553 B CR Ref. N Option Description Price in Jan 1999 US Dollars 33-320 Cargo Door Floodlights 34-328 GPWS - Enhanced (Allied Signal) 34-330 FMS - Single Collins FMS-4200 34-350 GPS - Single Collins GPS-4000 34-362 Altimeter - Baro Setting Reminder 34-390 FMS - On Board Data Loader 35-004 Eros Magic Mask (Three) 38-313 8 US Gal. Galley Water/Waste Tank System (With G1 Galley Selection) Total Technical Features xxxxxx Notes: x Interior Cabin - Midway entails the following: - - second flight attendant removed after CofA - - second flight attendant intercom system remains functional APPENDIX IV BUYER SELECTED OPTIONAL FEATURES FOR SECOND AIRCRAFT CS: ACA7575-B CR Ref. N Option Description Price in Jan 1999 US Dollars 00-008 Performance - Extended Range 00-312 Additional Flap Setting, 8 Deg Take-Off 00-313 Certification - FAA Strapping 21-309 Ground Air Conditioning Connection 23-331 VHF Comm Third Radio Complete Provisions 23-350 Selcal System 25-060x Paint Scheme - ACA - United Express 25-22-301 In-Arm Meal Tables At Front Row 25-22-302 Underseat Life Vest Pouches 25-22-303 Leather Passenger Seat Dress Covers, 50 Seats 25-22-304 Reclining Passenger Seats 25-23-301 Second Flight Attendant Fold-Down Seat (With Hand-Set / Intercom) 25-24-301 Entrance Storage Compartment 25-26-301 Partition - LHD Windscreen 25-26-302 Partition - RHD Windscreen 25-31-301 G1 Galley: Provisions For Snack And Hot Beverage Service (Prov. 2 Carts) 25-31-306 G1 Galley: Storable Work Shelf 25-320xx Interior Cabin - Midway 25-34-310 Atlas Standard Beverage Maker - Coffee (Qty 2) 25-61-3XX Emergency Equipment - Midway - Type Spec 25-62-301 Third Oxygen Mask In Lhs Psu 30-001 Ice Detection - Red Warning Light 31-340 FDR - 128 WPS DFDR (L3Comm) 33-003 Red Beacon Lights 33-310 Tail Logo Flood Lights BUYER SELECTED OPTIONAL FEATURES FOR SECOND AIRCRAFT - CONTINUED CS: ACA7575-B CR Ref. N Option Description Price in Jan 1999 33-320 Cargo Door Floodlights 34-328 GPWS - Enhanced (Allied Signal) 34-330 FMS - Single Collins FMS-4200 34-350 GPS - Single Collins GPS-4000 34-362 Altimeter - Baro Setting Reminder 34-390 FMS - On Board Data Loader 35-004 Eros Magic Mask (Three) 38-313 8 US Gal. Galley Water/Waste Tank System (With G1 Galley Selection) Total Technical Features xxxxxx Notes: x xxxxxx xx Interior Cabin - Midway entails the following: - - second flight attendant removed after CofA - - second flight attendant intercom system remains functional CONTRACT CHANGE ORDER PURCHASER: Atlantic Coast Airlines PURCHASE AGREEMENT NO.: PA-0454 (the "Agreement") AIRCRAFT TYPE: CRJ C.C.O. NO.: 6 DATED: July 19, 2002 PAGES: 64 REASON FOR CHANGE To amend the Agreement to: (i) provide Buyer with twenty-five (25) incremental aircraft (the "Incremental Aircraft") and thereby increase the order to sixty-one (61) firm Aircraft, (ii) amend the base price for the Buyer Selected Optional Features xxxxxx, (iii) amend the payment terms for the Incremental Aircraft, (iv) amend the acceptance procedures, (v) amend the Excusable Delay provisions to include reference to the Additional xxxxxx Credit Memorandum and the xxxxxx Credit Memorandum, (vi) amend the Non-Excusable Delay provisions to include reference to the Additional xxxxxx Credit Memorandum and the xxxxxx Credit Memorandum, (vii) revise the Delivery Schedule to include the delivery positions for the Incremental Aircraft to be delivered under the Agreement, (viii) delete the VHF NAV - FM Immunity (VIR-432+) from the Buyer Selected Optional Features for the xxxxxx Aircraft, and delete the Performance - Extended Range - 51,0000 lb MTOW and replace with the MTOW -53,000 lb (Long Range Version) for the xxxxxx Aircraft, (ix) extend the term of the FSR due to the Incremental Aircraft being acquired, (x) revise the amount of the Credit Memoranda found in the Credit Memoranda Letter Agreement due to the changes in the Buyer Selected Optional Features and add a xxxxxx Credit Memorandum applicable only to the Incremental Aircraft, (xi) amend the financing provisions found in the Financing Letter Agreement, (xii) amend the xxxxxx for the Buyer Selected Optional Features for the Option Aircraft due to changes to such features and (xiii) introduce a new Letter Agreement No. 14 xxxxxx for a cabin trainer data package. In addition, certain provisions agreed by the parties in the xxxxxx not yet incorporated into the Agreement are hereby incorporated into the Agreement to account for the xxxxxx in xxxxxx value xxxxxx. In addition, a new Letter Agreement No. 15 is introduced to xxxxxx. PAGES TO BE SUBSTITUTED NEW/REVISED PAGES Purchase Agreement, page 10 Attachment 1 to CCO No. 6 Purchase Agreement, pages 12a and 12b Attachment 2 to CCO No. 6 Purchase Agreement, pages 19, 20, 21 and 21A Attachment 3 to CCO No. 6 Purchase Agreement, page 27 Attachment 4 to CCO No. 6 Purchase Agreement, page 29 Attachment 5 to CCO No. 6 Purchase Agreement, pages 52a and 52b Attachment 6 to CCO No. 6 Purchase Agreement, pages 54a-i, 54a-ii 54b-i and 54b-ii Attachment 7 to CCO No. 6 Purchase Agreement, page C-1 Attachment 8 to CCO No. 6 Letter Agreement No. 001B, pages 1, 2 and 3 Attachment 9 to CCO No. 6 Letter Agreement No. 004A Attachment 10 to CCO No. 6 Letter Agreement No. 009, pages 1, 2 and 3 Attachment 11 to CCO No. 6 Letter Agreement No. 0l2A, page 3 Attachment 12 to CCO No. 6 Letter Agreement No. 014 Attachment 13 to CCO No. 6 Letter Agreement No. 015 Attachment 14 to CCO No. 6 DESCRIPTION OF CHANGE: P.A. and all Letter Agreements All references tothirty-six (36) Aircraft are hereby changed to refer to sixty-one (61) Aircraft. P.A., page 10 Article 4.1 (b) is amended by deleting the words xxxxxx from the first, second and third lines and replacing them with the words xxxxxx Article 4.3.3 is amended by adding the words xxxxxx in the second line. P.A., pages 12 and 12a Article 5.2.3 is amended by (1) inserting sub-article (i) for the xxxxxxAircraft which were previously the xxxxxx and amending (a) accordingly, (2) inserting sub-article (ii) as follows: xxxxxx and (3) amending the last sentence in this Article by inserting the words "and 5.2.3 (ii) (b), (c) and (d)" after the words "5.2.3 (b), (c) and (d)". P.A., pages 19, 20 and 21 Article 9.1 is amended to revise the delivery notice procedure and to provide xxxxxx P.A., page 27 Article 13.2 (b) is amended by adding the words xxxxxx before the word "and" and replacing the words xxxxxx with the words xxxxxx after the word "and" in the sixth line of this Article. P.A., page 29 Article 14.2 is amended by adding the words "xxxxxx, before the word "and" and the word xxxxxx after the word "and" in the fourth line of this Article. P.A., page 52 - Appendix II (Delivery Schedule) The Delivery Schedule is amended to add the Incremental Aircraft to be delivered under the Agreement. P.A., page 54 - Appendix IV (Buyer Selected Optional Features) Appendix IV is deleted in its entirety and replaced with Appendix IV- A for the xxxxxxAircraft and Appendix IV-B for the xxxxxx Aircraft. P.A., page C-1 - (FSR Term) The term for the FSR is amended xxxxxx, due to the Incremental Aircraft being acquired. Letter Agreement No. 001B, page 1 - (Credit Memorandum) Article 2.0 of Letter Agreement No. 001B is amended by deleting the words xxxxxx from the fifth and sixth lines and replacing them with the words xxxxxx. Articles 4.0 and 5.0 are amended by renumbering them Articles 5.0 and 6.0. A new Article 4.0 is inserted as follows: "In consideration of Buyer having entered into the term sheet dated June 3, 2002 xxxxxx xxxxxx The credit memorandum, as adjusted, will be individually known as the "xxxxxx Credit Memorandum" or collectively be known as the "xxxxxx Credit Memoranda". Letter Agreement No. 004 - (Financing) Letter Agreement No. 004 is deleted in its entirety and replaced by Letter Agreement No. 004A which is set forth in Attachment No. 10 hereto. Letter Agreement No. 009 - (Reconciliation) Article 2.0 of Letter Agreement No. 009 is replaced with the following paragraph: xxxxxx And Article 3.0 is amended by adding the words "Article 2.0," after the words "No. 1" in the first sentence of this Article. Letter Agreement No. 012A - (Additional Option Aircraft) Letter Agreement No. 012A is amended by deleting the words xxxxxx from the first through third lines and replacing them with the words xxxxxx. Letter Agreement No. 014 Letter Agreement No. 014 is introduced xxxxxx a cabin trainer data package and is set forth in Attachment No. 13 hereto. Letter Agreement No. 015 Letter Agreement No. 015 is introduced to xxxxxx of the xxxxxx This CCO No. 6 is conditional upon Buyer executing CCO No. 21 to RJ- 350 failing which this CCO No. 6 shall become null and void. EXCEPT AS SET FORTH ABOVE OR IN THE ATTACHMENTS HERETO, 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:_____________________ ARTICLE 4 - PRICE 4.1 (a) The base price for each of the Aircraft (excluding the Buyer Selected Optional Features) Ex Works (Incoterms 1990) Bombardier's offices or premises in Montreal, Province of Quebec, Canada, is xxxxxx expressed in January 1, 1999 dollars. x (b) The base price of the Buyer Selected Optional Features is xxxxxx expressed in January 1, 1999 dollars. The Aircraft base price (the "Aircraft Base Price") shall be the base price for the Aircraft as stated in paragraph (a), plus the base price of the Buyer Selected Optional Features as stated in paragraph (b) ("Base Price"). 4.2 The price of the Aircraft (the "Aircraft Purchase Price") shall be the Base Price adjusted to the date of delivery to reflect economic fluctuations during the period from January 1, 1999 to the respective delivery date of the Aircraft. Such adjustments shall be based on the formula as found in Appendix I ("Economic Adjustment Formula"),xxxxxx. 4.3 Upon the occurrence of events as described in this paragraph 4.3, there will be adjustments as follows: 4.3.1 In the event that Bombardier and Buyer agree to any changes in the Specification or selected optional features, or should changes in the Specification or selected optional features be made pursuant to Article 11.1 or as a result of any Regulatory Changes pursuant to Article 8.4 which are chargeable to Buyer pursuant to Article 8.5, or in the event that Bombardier and Buyer agree to any xxxxxx. 4.3.2 The Credit Memorandum adjustment shall be in accordance with the terms of Letter Agreement No. 1. x 4.3.3 xxxxxx ARTICLE 5 - PAYMENT 5.1 Bombardier acknowledges having previously received a deposit of xxxxxx for each of the xxxxxx Aircraft xxxxxx Aircraft) xxxxxx, totaling xxxxxx. 5.2 Advance Payment 5.2.1 xxxxxx 5.2.2 xxxxxx x5.2.3 In addition, Buyer shall make payment or cause payment to be made for each firm Aircraft as follows: xxxxxx All payments referred to in paragraphs 5.2.3 (i) (b), (c) and (d) and 5.2.3 (ii) (b), (c) and (d) above are to be made on the first day of the applicable month. 5.3 Payment Terms On or before the Delivery Date Bombardier shall have received in full the amount of the Aircraft Purchase Price of such Aircraft less the amount of the applicable Credit Memorandum as set out in Letter Agreement No. 1 Article 3.0, which will be credited by Bombardier toward the Aircraft Purchase Price (said amount being the "Net Aircraft Purchase Price"). 5.4 Subject to the provisions of Article 9.9 hereof, should Buyer fail to make any of the aforementioned payments on or before the stipulated date and Buyer does not correct the default within a period of thirty (30) days thereafter, this Agreement shall automatically terminate and Bombardier shall have no further obligation to Buyer under this Agreement, including the obligation to proceed further with the manufacture of the Aircraft on behalf of Buyer or the sale and/or delivery of the Aircraft to Buyer. Bombardier shall have the option (but not the obligation) of waiving such termination should Buyer make arrangements satisfactory to Bombardier for such payment and all future payments within ten (10) calendar days of Buyer's default. ARTICLE 9 - ACCEPTANCE PROCEDURE x9.1 Bombardier shall give Buyer notice, by facsimile or telegraphic communication or other expeditious means, of the date of readiness of each Aircraft for inspection and acceptance by Buyer as follows: a) Bombardier will give notice of no less than xxxxxx, confirming the day (the "Readiness Date") on which the Aircraft will be available for delivery and the commencement of inspection. xxxxxx xxxxxx 9.2 Within two (2) days following receipt by Buyer of the notice of Readiness Date Buyer shall: (a) provide notice to Bombardier as to the source and method of payment of the balance of the Aircraft Purchase Price; (b) identify to Bombardier the names of Buyer's representatives who will participate in the inspection, flight test and acceptance; and (c) provide evidence of the authority of the designated persons to execute the Certificate of Acceptance and other delivery documents on behalf of Buyer. 9.3 Buyer shall have three (3) consecutive working days commencing on the Readiness Date in which to complete the inspection and flight test (such three (3) working day period being the "Acceptance Period"). This three (3) day period may be extended in the event of any delay by Bombardier in making the Aircraft available for inspection and flight test. 9.4 Up to four (4) representatives of Buyer may participate in Buyer's ground inspection of the Aircraft and two (2) representatives of Buyer may participate in the flight test. Bombardier shall, if requested by Buyer, perform an acceptance flight of not less than one (1) and not more than three (3) hours duration. Ground inspection, in accordance with procedures to be mutually agreed to, and flight test shall be conducted in accordance with Bombardier's acceptance procedures (a copy of which shall be provided to Buyer at least 30 days prior to the Scheduled Delivery Date of the First Aircraft hereunder), as may be amended by mutual agreement of Buyer and Bombardier, and at Bombardier's expense. At all times during ground inspection and flight test, Bombardier shall retain control over the Aircraft. 9.5 If no Aircraft defect or discrepancy is revealed during the ground inspection or flight test, Buyer shall accept the Aircraft on or before the last day of the Acceptance Period in accordance with the provisions of Article 9.7. 9.6 If any material defect or discrepancy in the Aircraft is revealed by Buyer's ground inspection or flight test, the defect or discrepancy will promptly be corrected by Bombardier, at no cost to Buyer, which correction may occur during or after the Acceptance Period depending on the nature of the defect or discrepancy and of the time required for correction. To the extent necessary to verify such correction, Bombardier shall perform one (1) or more further acceptance flights or ground inspections as applicable. Notwithstanding the provisions of Article 4.2, should the Delivery Date of an Aircraft occur in the month subsequent to the Scheduled Delivery Date due to the correction of defects or discrepancies, xxxxxx. 9.7 Upon completion of the ground inspection and acceptance flight of the Aircraft and correction of any defects or discrepancies: (a) Buyer will sign a Certificate of Acceptance (in the form of Exhibit I hereto) for the Aircraft. Execution of the Certificate of Acceptance by or on behalf of Buyer shall be evidence of Buyer having examined the Aircraft and found it in accordance with the provisions of this Agreement. The date of signature of the Certificate of Acceptance shall be the "Acceptance Date"; (b) Bombardier will supply a TC Certificate of Airworthiness for Export; and (c) Buyer shall pay Bombardier the balance of the xxxxxx and any other amounts due, at which time Bombardier shall issue an FAA bill of sale and a warranty bill of sale in a form acceptable to Bombardier and financiers (substantially in accordance with the forms attached as Exhibit II(a) and Exhibit II(b) hereto), passing to Buyer, or approved assignee pursuant to Article 20, good title to the Aircraft free and clear of all liens, claims, charges and encumbrances except for those liens, charges or encumbrances created by or claimed through Buyer (the "Bill of Sale"). The date on which Bombardier delivers the Bill of Sale and Buyer takes delivery of the Aircraft shall be the "Delivery Date". Delivery of the Aircraft shall be evidenced by the execution and delivery of the Bill of Sale and of the Certificate of Receipt of Aircraft (in the form of Exhibit III hereto). 9.8 Provided that Bombardier has met all of its obligations under this Article 9, should Buyer not accept, pay for and take delivery of any of the Aircraft within ten (10) calendar days after the end of the Acceptance Period of such Aircraft, Buyer shall be deemed to be in default of the terms of this Agreement xxxxxx. 9.9 Should the Buyer be in default pursuant to Article 9.8 hereof, Buyer shall promptly, upon demand, reimburse Bombardier for all costs and expenses reasonably incurred by Bombardier as a result of such Buyer's failure to accept or take delivery of the Aircraft, including but not limited to reasonable amounts for storage, insurance, taxes, preservation or protection of the Aircraft, and provided that Bombardier has met all of its obligations under this Article 9, should Buyer not accept, pay for and/or take delivery of any one of the Aircraft within forty-five (45) calendar days following the end of the Acceptance Period, Bombardier may, at its option, terminate the present Agreement with respect to any of the undelivered Aircraft. Bombardier shall however, have the option (but not the obligation) of waiving such termination should Buyer, within ten (10) calendar days following such termination, make arrangements satisfactory to Bombardier to accept delivery and provide payment for all amounts owing or to become due pursuant to this Agreement. xxxxxx 13.2 (a) If Bombardier concludes, based on its appraisal of the facts and normal scheduling procedures, that due to Excusable Delay it can be reasonably anticipated that delivery of the Aircraft will be delayed, Bombardier shall give prompt written notice to Buyer of such delay. Bombardier and Buyer agree to collaborate and to use their reasonable efforts to mitigate the impact of such delays upon the parties. x (b) If, as a result of an Excusable Delay, delivery of the Aircraft will be delayed to a date beyond the originally Scheduled Delivery Date or any revised date previously agreed to in writing by the parties, Buyer and Bombardier agree, xxxxxx (c)In the event of an Excusable Delay, or xxxxxx an anticipated Excusable Delay xxxxxx shall conduct an appraisal of the facts and normal scheduling procedures, and if it concludes that delivery of one or more of the Aircraft will be delayed xxxxxx after the originally Scheduled Delivery Date or any revised date agreed to in writing by the parties, xxxxxx may then terminate this Agreement with respect to such delayed Aircraft by giving written notice xxxxxx ARTICLE 14 - NON-EXCUSABLE DELAY 14.1 If delivery of the Aircraft is delayed beyond the end of the Scheduled Delivery Date, by causes not excused under Article 13.1, this shall constitute a non-excusable delay (a "Non-Excusable Delay"). x14.2 If as a result of an Non-Excusable Delay, delivery of the Aircraft will be delayed to a date beyond the originally Scheduled Delivery Date or any revised date previously agreed to in writing by the parties, the Aircraft Purchase Price of the Aircraft at delivery, xxxxxx APPENDIX II x DELIVERY SCHEDULE First Aircraft xxxxxx Second Aircraft xxxxxx Third Aircraft xxxxxx Fourth Aircraft xxxxxx Fifth Aircraft xxxxxx Sixth Aircraft xxxxxx Seventh Aircraft xxxxxx Eighth Aircraft xxxxxx Ninth Aircraft xxxxxx Tenth Aircraft xxxxxx Eleventh Aircraft xxxxxx Twelfth Aircraft xxxxxx Thirteenth Aircraft xxxxxx Fourteenth Aircraft xxxxxx Fifteenth Aircraft xxxxxx Sixteenth Aircraft xxxxxx Seventeenth Aircraft xxxxxx Eighteenth Aircraft xxxxxx Nineteenth Aircraft xxxxxx Twentieth Aircraft xxxxxx Twenty-first Aircraft xxxxxx Twenty-second Aircraft xxxxxx Twenty-third Aircraft xxxxxx Twenty-fourth Aircraft xxxxxx Twenty-fifth Aircraft xxxxxx Twenty-sixth Aircraft xxxxxx Twenty-seventh Aircraft xxxxxx Twenty-eighth Aircraft xxxxxx Twenty-ninth Aircraft xxxxxx Thirtieth Aircraft xxxxxx Thirty-first Aircraft xxxxxx Thirty-second Aircraft xxxxxx Thirty-third Aircraft xxxxxx Thirty-fourth Aircraft xxxxxx Thirty-fifth Aircraft xxxxxx Thirty-sixth Aircraft xxxxxx Thirty-seventh Aircraft xxxxxx Thirty-eighth Aircraft xxxxxx DELIVERY SCHEDULE - CONTINUED Thirty-ninth Aircraft xxxxxx Fortieth Aircraft xxxxxx Forty-first Aircraft xxxxxx Forty-second Aircraft xxxxxx Forty-third Aircraft xxxxxx Forty-fourth Aircraft xxxxxx Forty-fifth Aircraft xxxxxx Forty-sixth Aircraft xxxxxx Forty-seventh Aircraft xxxxxx Forty-eighth Aircraft xxxxxx Forty-ninth Aircraft xxxxxx Fiftieth Aircraft xxxxxx Fifty-first Aircraft xxxxxx Fifty-second Aircraft xxxxxx Fifty-third Aircraft xxxxxx Fifty-fourth Aircraft xxxxxx Fifty-fifth Aircraft xxxxxx Fifty-sixth Aircraft xxxxxx Fifty-seventh Aircraft xxxxxx Fifty-eight Aircraft xxxxxx Fifty-ninth Aircraft xxxxxx Sixtieth Aircraft xxxxxx Sixty-first Aircraft xxxxxx APPENDIX IV-A BUYER SELECTED OPTIONAL FEATURES FOR THE THIRD THROUGH NINTH AIRCRAFT CS: A7553 B CR Ref. N Option Description Price in Jan 1999 US Dollars 00-008 Performance - Extended Range - 51,000 lb xxxxxx MTOW 00-312 Additional Take Off Flap Setting - 8 Deg xxxxxx 00-313 Certification - FAA (FAR 25) xxxxxx 25-060 Paint Scheme - Atlantic Coast Airline - xxxxxx xx United Express 25-22-301 PAX Seat - In-Arm Meal Trays In Front Row xxxxxx 25-22-302 PAX Seat - Life Vest Pouch (25 Seat xxxxxx Pairs) 25-22-304 PAX Seat - Recline Feature (21 Seat xxxxxx Pairs) 25-24-301 Entrance Stowage Compartment - Galley xxxxxx Insert Provisions 25-31-301 G1 Galley - Provisions For Snack & Hot xxxxxx Beverage Service 25-31-306 G1 Galley - Stowable Work Shelf xxxxxx 25-34-310 Beverage Maker -ATLAS Std (APC, Qty 2) xxxxxx 31-340 FDR - 128 WPS DFDR (L3Comm) xxxxxx 33-003 Lights - Red Beacon xxxxxx 33-310 Lights - Tail Logo xxxxxx 33-320 Lights - Baggage Door Floodlight xxxxxx 34-328 GPWS - Enhanced (Allied Signal) xxxxxx 34-335 FMS - Single, ACARS Compatible (Collins xxxxxx FMS-4200) 34-350 GPS - Single (Collins GPS-4000) xxxxxx 34-362 Altimeter - Baro Setting Reminder xxxxxx 35-004 Oxygen - Flight Crew (Eros Magic Mask, xxxxxx Three) 38-313 Water - 8 US Gal.Tank xxxxxx Total Buyer Selected Optional Features xxxxxx x APPENDIX IV-A - CONTINUED BUYER SELECTED OPTIONAL FEATURES FOR THE THIRD THROUGH NINTH AIRCRAFT CS: A7553 B CR Ref. N Option Description Price in Jan 1999 US Dollars Notes: x 1 Xxxxxx 25-26-301 Partition - LHD Windscreen xxxxxx 25-26-302 Partition - RHD Windscreen xxxxxx 30-001 Ice Detection - Red Warning Light xxxxxx 31-320 EICAS 2000 xxxxxx 2 xxxxxx 34-353 VHF NAV - FM Immunity (VIR-432+) xxxxxx xxxxxx All prices listed above are expressed in January 1, 1999 US dollars, and are subject to economic adjustment to the date of aircraft delivery as provided in the Agreement. APPENDIX IV-B BUYER SELECTED OPTIONAL FEATURES FOR THE TENTH THROUGH SIXTY-FIRST AIRCRAFT CS: A7553 B CR Ref. N Option Description Price in Jan 1999 US Dollars 00-015 MTOW - 53,000 lb (Long Range Version) xxxxxx x 00-312 Additional Take Off Flap Setting - 8 Deg xxxxxx 00-313 Certification - FAA (FAR 25) xxxxxx 25-060 Paint Scheme - Atlantic Coast Airline - xxxxxx xx United Express 25-22-301 PAX Seat - In-Arm Meal Trays In Front Row xxxxxx 25-22-302 PAX Seat - Life Vest Pouch (25 Seat xxxxxx Pairs) 25-22-304 PAX Seat - Recline Feature (21 Seat xxxxxx Pairs) 25-24-301 Entrance Stowage Compartment - Galley xxxxxx Insert Provisions 25-31-301 G1 Galley - Provisions For Snack & Hot xxxxxx Beverage Service 25-31-306 G1 Galley - Stowable Work Shelf xxxxxx 25-34-310 Beverage Maker -ATLAS Std (APC, Qty 2) xxxxxx 31-340 FDR - 128 WPS DFDR (L3Comm) xxxxxx 33-003 Lights - Red Beacon xxxxxx 33-310 Lights - Tail Logo xxxxxx 33-320 Lights - Baggage Door Floodlight xxxxxx 34-328 GPWS - Enhanced (Allied Signal) xxxxxx 34-335 FMS - Single, ACARS Compatible (Collins xxxxxx FMS-4200) 34-350 GPS - Single (Collins GPS-4000) xxxxxx 34-362 Altimeter - Baro Setting Reminder xxxxxx 35-004 Oxygen - Flight Crew (Eros Magic Mask, xxxxxx Three) 38-313 Water - 8 US Gal.Tank xxxxxx Subtotal xxxxxx 1 Less: Fleet Amortized Credit for Long- xxxxxx Range MTOW (CRN 00-015) Less: Additional Credit for Long-Range xxxxxx MTOW (CRN 00-015) Grand Total Buyer Selected Optional Features xxxxxx x APPENDIX IV-B - CONTINUED BUYER SELECTED OPTIONAL FEATURES FOR THE TENTH THROUGH SIXTY-FIRST AIRCRAFT CS: A7553 B CR Ref. N Option Description Price in Jan 1999 US Dollars Notes: x 1 Xxxxxx 2 Xxxxxx 25-26-301 Partition - LHD Windscreen xxxxxx 25-26-302 Partition - RHD Windscreen xxxxxx 30-001 Ice Detection - Red Warning Light xxxxxx 31-320 EICAS 2000 xxxxxx 3 xxxxxx: 34-353 VHF NAV - FM Immunity (VIR-432+) xxxx xx xxxxxx All prices listed above are expressed in January 1, 1999 US dollars, and are subject to economic adjustment to the date of aircraft delivery as provided in the Agreement. 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 Bombardier 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 Bombardier 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 x Such assignment shall be for xxxxxx, and shall commence approximately one (1) month prior to the Delivery Date of the first Aircraft. At Buyer's request, the term shall begin upon the expiration of the term of Buyer's right to assignment of an FSR pursuant to purchase agreement No. PA- 0350. 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").August 02, 2000 Atlantic Coast Airlines 515A Shaw Road, Dulles, Virginia, U.S.A. 20166 Gentlemen, xLetter Agreement No. 001B to Purchase Agreement No. PA-0454 dated July 29, 1999 (the "Agreement" between Bombardier Inc. ("Bombardier") and Atlantic Coast Airlines ("Buyer") relating to the purchase of sixty-one (61) Canadair Regional Jet Aircraft (the "Aircraft") This Letter Agreement No. 001B dated August 02, 2000 cancels and supersedes Letter Agreement No. 001A dated September, 24, 1999. Subject: Credit Memoranda 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. x 2.0 In consideration of Buyer having entered into the above referenced Agreement for the purchase of sixty-one (61) Aircraft, Bombardier will issue to Buyer, upon delivery and payment of the price of the Aircraft in accordance with the Agreement, a credit memorandum in the amount of xxxxxx for each of the Aircraft xxxxxx 3.0 xxxxxx The credit memorandum will be adjusted on the same pro-rata percentage calculation as other aircraft price changes due to changes in the Specification or Buyer selected optional features as otherwise provided for in this Agreement. The credit memorandum, as adjusted, will be individually known as the "Credit Memorandum" or collectively be known as the "Credit Memoranda". xx 4.0 xxxxxx x 5.0 In the event of the Termination of the Agreement, this Letter Agreement shall become automatically null and void with respect to any undelivered Aircraft. x 6.0 The provisions of this Letter Agreement are personal to Buyer and shall not be assigned or otherwise disposed of by Buyer, except as required for financing purposes in accordance with Letter Agreement No. 004 (Financing) and except as part of an assignment of the Agreement as expressly permitted in Article 20 of the Agreement, without the prior written consent of Bombardier. 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:_____________ Name: Title: Acknowledged and Accepted Atlantic Coast Airlines ________________________ Date:_____________ Name: Title: July 19, 2002 Atlantic Coast Airlines 45200 Business Court, Sterling, Virginia, U.S.A. 20166 Gentlemen, x Letter Agreement No. 004A to Purchase Agreement No. PA-0454 dated July 29, 1999 (the "Agreement"), as amended, between Bombardier Inc. ("Bombardier") and Atlantic Coast Airlines ("Buyer") relating to the purchase of sixty-one (61) Canadair Regional Jet Aircraft (the "Aircraft") This Letter Agreement No. 004A dated July 19, 2002 cancels and supersedes Letter Agreement No. 004 dated July 29, 1999. Subject: Financing 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. 1.1 This Letter Agreement describes the general terms and conditions of the financing assistance to be provided by Bombardier to Buyer. xxxxxx 2.0 Financing Assistance 2.1 Financing assistance referred to in this Letter Agreement No. 004 shall apply only to the Financed Aircraft. Financing for the Financed Aircraft will be arranged by Buyer working in coordination with Bombardier. The form of any support which may be provided by Bombardier is to be treated as confidential and is not to be provided by Buyer to any third party without the third party executing Bombardier's confidentiality agreement. It is Buyer's responsibility to have such form executed with any third party prior to Buyer's disclosure of any such information and to provide such form to Bombardier for approval. The above does not apply where Buyer or the applicable third party is required to disclose such information by law or compelled by court order to do so. 2.2 xxxxxx 2.3 xxxxxx 3.0 xxxxxx 4.0 xxxxxx 5.0 xxxxxx 6.0 In the event of the termination of the Agreement pursuant to Article 16.1 or 16.2 as a result of a default or breach of the Agreement by Buyer, this Letter Agreement shall become automatically null and void with respect to any undelivered Aircraft. 7.0 The provisions of this Letter Agreement are personal to Buyer and shall not be assigned or otherwise disposed of by Buyer except as permitted herein or as part of an assignment of the Agreement expressly permitted by Article 20 of the Agreement. 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:_____________ Name: Title: Acknowledged and Accepted Atlantic Coast Airlines ________________________ Date:_____________ Name: Title: July 29, 1999 Atlantic Coast Airlines 515A Shaw Road Dulles, Virginia, U.S.A. 20166 Gentlemen, xLetter Agreement No. 009 to Purchase Agreement No. PA-0454 dated July 29, 1999 (the "Agreement" between Bombardier Inc. ("Bombardier") and Atlantic Coast Airlines ("Buyer") relating to the purchase of sixty-one (61) Canadair Regional Jet Aircraft (the "Aircraft") Subject: Reconciliation 1.0 The parties recognize that in the course of the administration of this Agreement, xxxxxx x2.0 xxxxxx 3.0 xxxxxx 4.0This 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. 5.0The provisions of this Letter Agreement are personal to Buyer and shall not be assigned or otherwise disposed of by Buyer except as part of an assignment of the Agreement (in whole not in part) expressly permitted under Article 20 of the Agreement and otherwise such consent shall not be unreasonably withheld. 6.0In the event of the Termination of the Agreement, this Letter Agreement shall become automatically null and void with respect to any undelivered Aircraft. 7.0Should 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:_____________ Name : Title: Acknowledged and Accepted Atlantic Coast Airlines ________________________ Date:_____________ Name: Title: Attachment No. 12 to C.C.O. No. 6 dated July 19, 2002 Letter Agreement No. 012A Additional Option Aircraft (b) The base price of the Buyer Selected Optional Features is xxxxxx The Option Aircraft base price shall be the base price for the Option Aircraft as stated in paragraph (b)(ii)(a) above, plus the base price of the Buyer Selected Optional Features as stated in paragraph (b)(ii)(b) above (the "Option Aircraft Base Price"). The price of the Option Aircraft (the "Option Aircraft Purchase Price") shall be the Option Aircraft Base Price adjusted xxxxxx (iii) As consideration for this option, Buyer shall make or cause to make payment to Bombardier a xxxxxx per Option Aircraft (the "Option Deposit") upon execution of CCO No. 2, for a total amount of xxxxxx. The amount of xxxxxx (iv) Unless expressly provided for in the Agreement, the terms and conditions of the Agreement (including Letter Agreements, except as noted below) shall apply mutatis mutandis to the Option Aircraft, with the exception that the provisions with respect to Annex A training courses as specified in Article 3.2.4 of the Agreement (Flight Attendant Courses), shall not apply to the Option Aircraft. (v) The following Letter Agreement shall not apply to the Option Aircraft and is hereby excluded: Letter Agreement No. 012 (Additional Option Aircraft) July 19, 2002 Atlantic Coast Airlines 45200 Business Court, Dulles, Virginia, U.S.A. 20166 Gentlemen, xxLetter Agreement No. 014 to Purchase Agreement No. PA-0454 dated July 29, 1999 (the "Agreement" between Bombardier Inc. ("Bombardier") and Atlantic Coast Airlines ("Buyer") relating to the purchase of sixty-one (61) Canadair Regional Jet Aircraft (the "Aircraft") Subject: Cabin Trainer Data Package Gentlemen: 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 In consideration of Buyer having entered into the term sheet dated June 3, 2002 and in recognition of Buyer's request to manufacture a Cabin Trainer,xxxxxx 3.0 In the event of the Termination of the Agreement, this Letter Agreement shall become automatically null and void with respect to any undelivered Aircraft. 4.0 The provisions of this Letter Agreement are personal to Buyer and shall not be assigned or otherwise disposed of by Buyer, except as part of an assignment of the Agreement expressly permitted by Article 20 of the Agreement, without the prior written consent of Bombardier. 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:_____________ Name: Title: Acknowledged and Accepted ATLANTIC COAST AIRLINES ________________________ Date:_____________ Name: Title: July 19, 2002 Atlantic Coast Airlines 45200 Business Court, Dulles, Virginia, U.S.A. 20166 Gentlemen, xxLetter Agreement No. 015 to Purchase Agreement No. PA-0454 dated July 29, 1999, as amended (the "Agreement" between Bombardier Inc. ("Bombardier") and Atlantic Coast Airlines ("Buyer") relating to the purchase of sixty-one (61) Canadair Regional Jet Aircraft (the "Aircraft") Subject: xxxxxx Status Gentlemen: 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 Buyer and Bombardier agree to the following pertaining to the xxxxxx dated xxxxxx, as amended by revision thereto dated xxxxxx 2.1. xxxxxx 2.2 xxxxxx 2.3 The remaining provisions of the xxxxxx (Articles 2, 3, and 4) pertaining to the xxxxxx are no longer in effect.. 3.0 xxxxxx 4.0 xxxxxx 5.0 The provisions of this Letter Agreement are personal to Buyer and shall not be assigned or otherwise disposed of by Buyer, except as part of an assignment of the Agreement expressly permitted by Article 20 of the Agreement, without the prior written consent of Bombardier. 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. Name: Title: Acknowledged and Accepted ATLANTIC COAST AIRLINES Name: Title: