1 EXHIBIT 10.5 [BOEING LETTERHEAD] 6-1162-RLL-2234 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: Special Matters Reference: Purchase Agreement Nos. 2022, 2023, 2024, 2025 and 2026 (the Purchase Agreement) between The Boeing Company (Boeing) and Delta Air Lines, Inc. (Customer) relating to 737-632/-732/-832, 757-232, 767-332ER/-332, 767-432ER and 777-232IGW aircraft (the Aircraft). This Letter Agreement amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreements. A. MODEL 737-632/-732/-832 AIRCRAFT (P. A. 2022) 1. *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 737-632/-732/-832 2 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 2 2. *This confidential information has been omitted and filed separately with the Commission. 3. *This confidential information has been omitted and filed separately with the Commission. 4. *This confidential information has been omitted and filed separately with the Commission. 5. *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 737-632/-732/-832 3 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 3 *This confidential information has been omitted and filed separately with the Commission. 6. *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 737-632/-732/-832 4 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 4 *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 737-632/-732/-832 5 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 5 7. *This confidential information has been omitted and filed separately with the Commission. 8. *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 737-632/-732/-832 6 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 6 *This confidential information has been omitted and filed separately with the Commission. 9. *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 757-232 7 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 7 B. MODEL 757-232 AIRCRAFT (P. A. 2023) 1. *This confidential information has been omitted and filed separately with the Commission. 2. *This confidential information has been omitted and filed separately with the Commission. 3. *This confidential information has been omitted and filed separately with the Commission. 4. *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 757-232 8 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 8 5. *This confidential information has been omitted and filed separately with the Commission. 6. *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 767-332ER/-332 9 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 9 C. MODEL 767-332ER/-332 AIRCRAFT (P. A. 2024) 1. *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 767-332ER/-332 10 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 10 2. *This confidential information has been omitted and filed separately with the Commission. 3. *This confidential information has been omitted and filed separately with the Commission. 4. *This confidential information has been omitted and filed separately with the Commission. 5. *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 767-332ER/-332 11 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 11 6. *This confidential information has been omitted and filed separately with the Commission. 7. *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 767-332ER/-332 12 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 12 *This confidential information has been omitted and filed separately with the Commission. 8. *This confidential information has been omitted and filed separately with the Commission. 9. *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 767-332ER/-332 13 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 13 D. MODEL 767-432ER AIRCRAFT (P. A. 2025) 1. *This confidential information has been omitted and filed separately with the Commission. 2. *This confidential information has been omitted and filed separately with the Commission. 3. *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 767-432ER 14 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 14 *This confidential information has been omitted and filed separately with the Commission. 4. *This confidential information has been omitted and filed separately with the Commission. 5. *This confidential information has been omitted and filed separately with the Commission. 6. *This confidential information has been omitted and filed separately with the Commission. 7. *This confidential information has been omitted and filed separately with the Commission. 8. *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 767-432ER 15 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 15 *This confidential information has been omitted and filed separately with the Commission. 10. *This confidential information has been omitted and filed separately with the Commission. 11. *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 767-432ER 16 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 16 *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 767-432ER 17 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 17 12. *This confidential information has been omitted and filed separately with the Commission. 13. *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 767-432ER 18 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 18 E. MODEL 777 AIRCRAFT (P. A. 2026) The following Special Matters are provided in consideration of Customer's exercise of its right to purchase Model 777-232IGW Aircraft per Purchase Agreement No. 2026. Boeing will grant Customer certain Option and Rolling Option Aircraft delivery positions at that time. 1. *This confidential information has been omitted and filed separately with the Commission. 2. *This confidential information has been omitted and filed separately with the Commission. 3. *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 777-232IGW 19 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 19 *This confidential information has been omitted and filed separately with the Commission. 4. *This confidential information has been omitted and filed separately with the Commission. 5. *This confidential information has been omitted and filed separately with the Commission. 6. *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 777-232IGW 20 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 20 7. *This confidential information has been omitted and filed separately with the Commission. 8. *This confidential information has been omitted and filed separately with the Commission. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 777-232IGW 21 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 21 F. CUSTOMER SUPPORT TRAINING INVOICE Boeing will maintain an accounting of all traditional and Customer unique flight and maintenance training used in the aggregate by Customer in accordance with the CS1 Supplemental Exhibits to Purchase Agreements 2022, 2023, 2024, 2025 and 2026 from the Execution Date to November 15, 2001. Any flight and/or maintenance training requested and used by Customer that is not identified in the CS1 Supplemental Exhibits will also be included in the accounting of all flight and maintenance training. The invoice amount that Customer will pay Boeing will be the difference between the dollar value of the Customer unique flight and maintenance training used by Customer and the dollar value of any traditional flight and maintenance training not used by Customer. Customer will be responsible for paying the invoice amount within thirty (30) days of receipt of such invoice from Boeing. P.A. No.'s 2022, 2023, 2024, 2025 and 2026 22 Delta Air Lines, Inc. 6-1162-RLL-2234 Page 22 Very truly yours, THE BOEING COMPANY By /s/ R.B. Woodard --------------------------------------- Its President --------------------------------------- ACCEPTED AND AGREED TO: Date: October 21, 1997 ------------------------------------ DELTA AIR LINES, INC. By /s/ Leo F. Mullin --------------------------------------- Its President and Chief Executive Officer -------------------------------------- P.A. No.'s 2022, 2023, 2024, 2025 and 2026 23 [BOEING LETTERHEAD] 6-1162-RLL-2245 Delta Air Lines Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: Certain Contractual Matters Reference: Purchase Agreement Nos. 2022, 2023, 2024, 2025, 2026 (the Purchase Agreements) between The Boeing Company (Boeing) and Delta Air Lines Inc. (Customer) relating to Model 737-632/-732/-832, 757-232, 767-332ER/-332, 767-432ER, 777-232IGW aircraft This Letter Agreement is entered into on the date below, and amends and supplements the AGTA and Purchase Agreements. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreements. *This confidential information has been omitted and filed separately with the Commission. P.A. Nos. 2022, 2023, 2024, 2025, 2026 24 Delta Air Lines, Inc. 6-1162-RLL-2245 Page 2 *This confidential information has been omitted and filed separately with the Commission. P.A. Nos. 2022, 2023, 2024, 2025, 2026 25 Delta Air Lines, Inc. 6-1162-RLL-2245 Page 3 *This confidential information has been omitted and filed separately with the Commission. P.A. Nos. 2022, 2023, 2024, 2025, 2026 26 Delta Air Lines, Inc. 6-1162-RLL-2245 Page 4 *This confidential information has been omitted and filed separately with the Commission. P.A. Nos. 2022, 2023, 2024, 2025, 2026 27 Delta Air Lines, Inc. 6-1162-RLL-2245 Page 5 *This confidential information has been omitted and filed separately with the Commission. P.A. Nos. 2022, 2023, 2024, 2025, 2026 28 Delta Air Lines, Inc. 6-1162-RLL-2245 Page 6 Very truly yours, THE BOEING COMPANY By /s/R.B. Woodard --------------------------------------- Its President --------------------------------------- ACCEPTED AND AGREED TO: Date: October 21, 1997 ------------------------------------ DELTA AIR LINES, INC. By /s/ Leo F. Mullin ------------------------------------- Its President and Chief Executive Officer ------------------------------------- P.A. Nos. 2022, 2023, 2024, 2025, 2026 29 [BOEING LETTERHEAD] 6-1162-RLL-2198 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: *This confidential information has been omitted and filed separately with the Commission. Reference: Purchase Agreement Nos. 2022, 2023, 2024, 2025, 2026 (the Agreements) between The Boeing Company (Boeing) and Delta Air Lines, Inc. (Customer) relating to Model 737-632/-732/-832, 757-232, 767-332ER/-332, 767-432ER, and 777-232IGW Aircraft (the Aircraft). *This confidential information has been omitted and filed separately with the Commission. P.A. Nos. 2022, 2023, 2024, 2025, 2026 30 Delta Air Lines, Inc. 6-1162-RLL-2198 Page 2 *This confidential information has been omitted and filed separately with the Commission. P.A. Nos. 2022, 2023, 2024, 2025, 2026 31 Delta Air Lines, Inc. 6-1162-RLL-2198 Page 3 *This confidential information has been omitted and filed separately with the Commission. P.A. Nos. 2022, 2023, 2024, 2025, 2026 32 Delta Air Lines, Inc. 6-1162-RLL-2198 Page 4 *This confidential information has been omitted and filed separately with the Commission. P.A. Nos. 2022, 2023, 2024, 2025, 2026 33 Delta Air Lines, Inc. 6-1162-RLL-2198 Page 5 *This confidential information has been omitted and filed separately with the Commission. Very truly yours, THE BOEING COMPANY By /s/ R.B. Woodard ------------------------------------- Its President ------------------------------------- ACCEPTED AND AGREED TO: Date: October 21 , 1997 ------------------------------------ DELTA AIR LINES, INC. By /s/ Leo F. Mullin ------------------------------------- Its President and Chief Executive Officer ------------------------------------- P.A. Nos. 2022, 2023, 2024, 2025, 2026 34 Table A *This confidential information has been omitted and filed separately with the Commission. Page 1 35 Table A *This confidential information has been omitted and filed separately with the Commission. Page 2 36 Table B *This confidential information has been omitted and filed separately with the Commission. Page 1 37 Table B *This confidential information has been omitted and filed separately with the Commission. Page 2 38 [BOEING LETTERHEAD] 6-1162-RLL-2242 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: 1997 and 1998 Escalation Sharing Reference: Purchase Agreement Nos. 2022, 2023, 2024 and 2025 (the Purchase Agreements) between The Boeing Company (Boeing) and Delta Air Lines, Inc. (Customer) relating to Model 737-632/-732/-832, 757-232, 767-332/332ER, and 767-432ER aircraft (the Aircraft) This Letter Agreement amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreement. 1. Escalation Sharing Commitment. Boeing agrees to share one-half of the escalation up to a maximum of three (3) percent per year in each of the calendar years 1997 and 1998 (the Sharing Credit), as set forth in paragraph 2 below, for any of the Aircraft scheduled to be delivered after December 31, 1996. For the purpose of this Letter Agreement such Aircraft are referred to as "Eligible Aircraft". All escalation calculations under this Letter Agreement will be made in accordance with Exhibit D to the AGTA entitled "Escalation Adjustment Airframe and Optional Features" (Exhibit D), using actual escalation indices published for the applicable period. The Sharing Credit, if applicable, will be provided as a credit memorandum taken against the Aircraft Price on the invoice at time of delivery of such Aircraft. 2. Escalation Credit Memo. 2.1 Aircraft Scheduled to be Delivered prior to 1997. No escalation sharing credit memorandum is provided for Aircraft scheduled to be delivered prior to January 1, 1997. P.A. Nos. 2022, 2023, 2024 and 2025 39 Delta Air Lines, Inc. 6-1162-RLL-2242 Page 2 2.2 Eligible Aircraft Scheduled to be Delivered in 1997. At the time of delivery of each Eligible Aircraft scheduled to be delivered in 1997, Boeing will issue to Customer a credit memorandum (the 1997 Sharing Credit) equal to one-half of the difference between the airframe and optional features escalation amount calculated for an assumed December 1996 delivery month (the 1996 Base Month) and the escalation amount calculated for the actual month in 1997 the Aircraft is scheduled to be delivered. The total credit percentage will be limited to a maximum of three (3) percent. The 1997 Sharing Credit will be determined as follows, utilizing the provisions of Exhibit D to establish the required escalation factors, including the provisions related to the rounding of the calculated factors to four decimal places: (a) Determine the escalation factor for the 1996 Base Month and define such factor as "A". (b) Determine the escalation factor for the actual month in 1997 that the Aircraft is scheduled to be delivered (the 1997 Actual Factor) and divide such 1997 Actual Factor by "A". If the resultant (i) is equal to or less than 1.0600, subtract 1.0000, divide by 2.0000 and add 1.0000 or (ii) is greater than 1.0600, subtract .0300. Define the resultant factor from either (i) or (ii) as "B". (c) Determine the adjusted escalation factor for the month in 1997 the Aircraft is scheduled to be delivered by multiplying "A" times "B" (the 1997 Adjusted Factor). The 1997 Sharing Credit is determined by multiplying the Airframe Price and Optional Features Price times the difference between the 1997 Adjusted Factor and the 1997 Actual Factor. 2.3 Eligible Aircraft Scheduled to be Delivered in 1998. At the time of delivery of each Eligible Aircraft scheduled to be delivered in 1998, Boeing will issue to Customer a credit memorandum (the 1998 Sharing Credit) equal to (i) an amount calculated pursuant to paragraph 2.2 above as if the actual month in 1997 the Aircraft is scheduled to deliver is December 1997 plus (ii) one-half of the difference between the airframe and optional features escalation amount calculated for such assumed December 1997 delivery month (the 1997 Base Month) and the amount calculated for the actual month in 1998 the Aircraft is scheduled to be delivered. The total credit percentage will be limited to a maximum of three (3) percent. The 1998 Sharing Credit will be determined as follows, utilizing the provisions of Exhibit D to establish the required escalation factors, including the provisions related to the rounding of the calculated factors to four decimal places: P.A. Nos. 2022, 2023, 2024 and 2025 40 Delta Air Lines, Inc. 6-1162-RLL-2242 Page 3 (a) Determine the escalation factor for both the 1996 Base Month (the 1996 Base Factor) and the 1997 Base Month (the 1997 Base Factor) and divide such 1997 Base Factor by such 1996 Base Factor. If the resultant (i) is equal to or less than 1.0600, subtract 1.0000, divide by 2.0000 and add 1.0000 or (ii) is greater than 1.0600, subtract .0300. Define the resultant factor from either (i) or (ii) as "B". (b) Determine the escalation factor for the actual month in 1998 that the Aircraft is scheduled to be delivered (the 1998 Actual Factor) and divide such factor by the 1997 Base Factor. If the resultant (i) is equal to or less than 1.0600, subtract 1.0000, divide by 2.0000 and add 1.0000 or (ii) is greater than 1.0600, subtract .0300. Define the resultant factor from either (i) or (ii) as "C". (c) Determine the adjusted escalation factor for the actual month in 1998 the Aircraft is scheduled to be delivered by multiplying "A" times "B" times "C" (the 1998 Adjusted Factor). The 1998 Sharing Credit is determined by multiplying the airframe and optional features escalation amount times the difference between the 1998 Adjusted Factor and the 1998 Actual Factor. 2.4 Eligible Aircraft Scheduled to be Delivered after 1998. At the time of delivery of each Eligible Aircraft scheduled to be delivered after calendar year 1998, Boeing will issue to Customer a credit memorandum (the Post-1998 Sharing Credit) equal to an amount calculated pursuant to paragraph 2.3 above as if the actual month in 1998 the Aircraft is scheduled to be delivered is December 1998, plus (ii) the airframe and optional features escalation amount calculated for such assumed December 1998 delivery month (the 1998 Base Month) and the amount calculated for the actual month the Aircraft is scheduled to be delivered. The Post-1998 Sharing Credit will be determined as follows, utilizing the provisions of Exhibit D to establish the required escalation factors, including the provisions related to the rounding of the calculated factors to four decimal places: (a) Determine the escalation factor for both the 1996 Base Month (the 1996 Base Factor) and the 1997 Base Month (the 1997 Base Factor) and divide such 1997 Base Factor by such 1996 Base Factor. If the resultant (i) is equal to or less than 1.0600, subtract 1.0000, divide by 2.0000 and add 1.0000 or (ii) is greater than 1.0600, subtract .0300. Define the resultant factor from either (i) or (ii) as "B". (b) Determine the escalation factor for the 1998 Base Month (the 1998 Base Factor) and divide such 1998 Base Factor by the 1997 Base Factor. If the P.A. Nos. 2022, 2023, 2024 and 2025 41 Delta Air Lines, Inc. 6-1162-RLL-2242 Page 4 resultant (i) is equal to or less than 1.0600, do not adjust the factor or (ii) is greater than 1.0600, subtract .0300. Define the resultant factor from either (i) or (ii) as "C". (c) Determine the escalation factor for the actual month after 1998 that the Aircraft is scheduled to be delivered (the Post-1998 Actual Factor) and divide such factor by the 1998 Base Factor. Define the resultant factor as "D". (d) Determine the adjusted escalation factor for the actual month after 1998 the Aircraft is scheduled to be delivered by multiplying "A" times "B" times "C" times "D" (the Post-1998 Adjusted Factor). The Post-1998 Sharing Credit is determined by multiplying the Airframe Price and Optional Features Price times the difference between the Post-1998 Adjusted Factor and the Post-1998 Actual Factor. 3. Revision of Advance Payment Base Price. The Advance Payment Base Prices set forth in Table 1 for each Eligible Aircraft reflect the above escalation sharing formulation. P.A. Nos. 2022, 2023, 2024 and 2025 42 Delta Air Lines, Inc. 6-1162-RLL-2242 Page 5 4. Credits Expressed as a Percentage. It is agreed that any credit memoranda specified in Letter Agreements Numbers, 6-1162-RLL-2234 which is expressed as a percentage or subject to escalation per the provisions of Exhibit D, will be based on the Airframe Price escalated per the escalation provisions set forth in Exhibit D as adjusted by utilizing the escalation sharing calculations set forth in this Letter Agreement. Very truly yours, THE BOEING COMPANY By /s/ R.B. Woodard ------------------------------------- Its President ------------------------------------- ACCEPTED AND AGREED TO: Date: October 21 , 1997 ----------------------- DELTA AIR LINES, INC. By /s/ Leo F. Mullin ------------------------------------- Its President and Chief Executive Officer ------------------------------------- P.A. Nos. 2022, 2023, 2024 and 2025 43 [BOEING LETTERHEAD] 6-1162-RLL-2243 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: *This confidential information has been omitted and filed separately with the Commission. Reference: Purchase Agreement Nos. 2022, 2023, 2024, 2025, and 2026 (the Purchase Agreements) between The Boeing Company (Boeing) and Delta Air Lines Inc. (Customer) relating to Model 737-632/-732/-832, (737 Aircraft), 757-232, (757 Aircraft), 767-332(767-332 Aircraft), 767-332ER (767-332ER Aircraft), 767-432ER, (767-432ER Aircraft) and 777-232IGW aircraft (777 Aircraft) This Letter Agreement amends and supplements the Purchase Agreements. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreements. *This confidential information has been omitted and filed separately with the Commission. P.A. Nos. 2022, 2023, 2024, 2025 and 2026 44 Delta Air Lines, Inc. 6-1162-RLL-2243 Page 2 *This confidential information has been omitted and filed separately with the Commission. P.A. Nos. 2022, 2023, 2024, 2025 and 2026 45 Delta Air Lines, Inc. 6-1162-RLL-2243 Page 3 *This confidential information has been omitted and filed separately with the Commission. Very truly yours, THE BOEING COMPANY By /s/ R. B. Woodard --------------------------------------------- Its President ------------------------------------------ ACCEPTED AND AGREED TO: Date: October 21 , 1997 ---------------------- DELTA AIR LINES, INC. By /s/ Leo F. Mullin --------------------------------------------- Its President and Chief Executive Officer --------------------------------------- P.A. Nos. 2022, 2023, 2024, 2025 and 2026 46 [BOEING LETTERHEAD] 6-1162-RLL-2241 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: *This confidential information has been omitted and filed separately with the Commission. Reference: Purchase Agreement Nos. 2022, 2024, 2025 and 2026 (the Purchase Agreements) between The Boeing Company (Boeing) and Delta Air Lines, Inc. (Customer) relating to Model 737-632/-732/-832, 767-332ER/332, 767-432ER and 777-232IGW aircraft (the Aircraft) This Letter Agreement amends and supplements the Purchase Agreements. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreements. *This confidential information has been omitted and filed separately with the Commission. P.A. Nos. 2022, 2024, 2025 and 2026 47 Delta Air Lines, Inc. 6-1162-RLL-2241 Page 2 *This confidential information has been omitted and filed separately with the Commission. Very truly yours, THE BOEING COMPANY By /s/ R. B. Woodard ------------------------------------------------------- Its President -------------------------------------------------------- ACCEPTED AND AGREED TO: Date: October 21 , 1997 ------------------------------- DELTA AIR LINES, INC. By /s/ Leo F. Mullin --------------------------------------------------------- Its President and Chief Executive Officer ------------------------------------------------------- P.A. Nos. 2022, 2024, 2025 and 2026 48 [BOEING LETTERHEAD] 6-1162-RLL-2244 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: *This confidential information has been omitted and filed separately with the Commission. Reference: Purchase Agreement Nos. 2022, 2024 and 2025, (the Agreements) between The Boeing Company (Boeing) and Delta Air Lines, Inc. (Customer) relating to Model 737-632/-732/-832, 767-332ER/-332 and 767-432ER (the Aircraft) This Letter Agreement amends and supplements the Agreements. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreements. 1. *This confidential information has been omitted and filed separately with the Commission. Very truly yours, THE BOEING COMPANY By /s/ R. B. Woodard ----------------------------------------------- Its President ---------------------------------------------- ACCEPTED AND AGREED TO: Date: October 21 , 1997 ------------------------------- DELTA AIR LINES, INC. By /s/ Leo F. Mullin ----------------------------------------------- Its President and Chief Executive Officer ---------------------------------------------- P.A. Nos. 2022, 2024,and 2025 49 [BOEING LETTERHEAD] 6-1162-RLL-2247 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: *This confidential information has been omitted and filed separately with the Commission. Reference: Purchase Agreement No. 2022, 2023, 2024, 2025,and 2026 (the Purchase Agreements) between The Boeing Company (Boeing) and Delta Air Lines, Inc. (Customer) relating to Model 737-632/-732/-832, 757-232, 767-332/-332ER, 767-432ER and 777-232IGW aircraft (the Aircraft) This Letter Agreement amends and supplements the Purchase Agreements. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreements. *This confidential information has been omitted and filed separately with the Commission. P.A. Nos. 2022, 2023, 2024, 2025 and 2026 50 Delta Air Lines, Inc. 6-1162-RLL-2247 Page 2 *This confidential information has been omitted and filed separately with the Commission. P.A. Nos. 2022, 2023, 2024, 2025 and 2026 51 Delta Air Lines, Inc. 6-1162-RLL-2247 Page 3 *This confidential information has been omitted and filed separately with the Commission. Very truly yours, THE BOEING COMPANY By /s/ R. B. Woodard ----------------------------------------------- Its President -------------------------------------------- ACCEPTED AND AGREED TO: Date: October 21 , 1997 ------------------------------- DELTA AIR LINES, INC. By /s/ Leo F. Mullin --------------------------------------------- Its President and Chief Executive Officer -------------------------------------------- P.A. Nos. 2022, 2023, 2024, 2025 and 2026 52 [BOEING LETTERHEAD] 6-1162-RLL-2251 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: *This confidential information has been omitted and filed separately with the Commission. Reference: Purchase Agreement Nos. 2022, 2023, 2024, 2025, 2026 (the Purchase Agreements) between The Boeing Company (Boeing) and Delta Air Lines, Inc. (Customer) relating to Model 737-632/-732/-832, 757-232, 767-332ER/-332, 767-432ER, 777-232IGW aircraft (the Aircraft) This Letter Agreement amends and supplements the Purchase Agreements. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreements *This confidential information has been omitted and filed separately with the Commission. P.A. Nos. 2022, 2023, 2024, 2025 and 2026 53 Delta Air Lines, Inc. 6-1162-RLL-2251 Page 2 *This confidential information has been omitted and filed separately with the Commission. Very truly yours, THE BOEING COMPANY By /s/ R. B. Woodard --------------------------------------- Its President -------------------------------------- ACCEPTED AND AGREED TO: Date: October 21 , 1997 --------------------------- DELTA AIR LINES, INC. By /s/ Leo F. Mullin --------------------------------------- Its President and Chief Executive Officer -------------------------------------- P.A. Nos. 2022, 2023, 2024, 2025 and 2026 54 [BOEING LETTERHEAD] 6-1162-RLL-2147 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: *This confidential information has been omitted and filed separately with the Commission. Reference: Purchase Agreement No. 2022 (the Purchase Agreement) between The Boeing Company (Boeing) and Delta Air Lines, Inc. (Customer) relating to Model 737-632/-732/-832 aircraft (the Aircraft) This Letter Agreement amends the Purchase Agreement and Exhibit C of the AGTA. All terms used but not defined in this Letter Agreement have the same meaning as in the Purchase Agreement and AGTA. *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2022 55 Delta Air Lines, Inc. 6-1162-RLL-2147 Page 2 *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2022 56 Delta Air Lines, Inc. 6-1162-RLL-2147 Page 3 *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2022 57 Delta Air Lines, Inc. 6-1162-RLL-2147 Page 4 *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2022 58 Delta Air Lines, Inc. 6-1162-RLL-2147 Page 5 *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2022 59 Delta Air Lines, Inc. 6-1162-RLL-2147 Page 6 *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2022 60 Delta Air Lines, Inc. 6-1162-RLL-2147 Page 7 4.1.2 If the Program is determined to be non-compliant, Customer will, upon request, submit to Boeing sufficient information reasonably required by Boeing to allow Boeing: (a) To verify cost elements of the Actual Maintenance Cost as defined in paragraph 3.4, (b) To verify the Fleet, Fleet Hours, and the Actual Average Flight Time per flight, (c) To analyze the problems causing such non-compliance, (d) To develop, when required, appropriate remedial action. 4.1.3 All reports submitted to Boeing will be addressed to the attention of: Director - Product Assurance Contracts Boeing Commercial Airplane Group P.O. Box 3707 Mail Stop 76-02 Fax: 206-237-1706 Seattle, Washington 98124-2207 4.2 Boeing's Obligation under the Program. 4.2.1 Boeing will report to Customer within 30 days after receiving Customer's report for each Reporting Period, the following data for that Reporting Period (see Attachment C): (a) Target Maintenance Cost, (b) Cumulative Average Target Maintenance Cost, (c) Actual Maintenance Cost (as adjusted for the amount of Subcontracted Maintenance), (d) Cumulative Average Actual Maintenance Cost, (e) Material price inflation factor, 4.2.2 At Customer's request, Boeing will provide Customer sufficient information to verify the data described in paragraph 4.2.1 and the calculations used to produce that data. P.A. No. 2022 61 Delta Air Lines, Inc. 6-1162-RLL-2147 Page 8 4.2.3 All reports submitted to Customer will be addressed to the attention of: Delta Air Lines, Inc. Technical Operations Division Controller Department 217 P.O. Box 20706 Atlanta, GA 30320 4.3 Corrective Action. If the Program is non-compliant under paragraph 3.5 and Customer provides its reports to Boeing pursuant to paragraph 4.1, then Boeing will: 4.3.1. Facilitate a meeting with the Customer to determine the exact problem(s) causing the increase in cost and 4.3.2. Within forty-five (45) days from the date of the meeting, produce a plan to investigate and resolve the possible causes of noncompliance determined in the meeting with the intent to minimize the time required to implement the corrective action. 4.3.3. Provide technical assistance to Customer in the form of analysis and recommendations of a kind and nature which Boeing determines to be best suited for reducing Actual Maintenance Cost. 4.3.4. If necessary, initiate a design review of the systems, accessories, equipment or parts determined by Boeing and Customer to be the primary cause of the non compliance and, when in Boeing's judgment a redesign is indicated as a technically and economically practicable means of attaining Program compliance, Boeing will, with Customer's concurrence, redesign or cause the redesign of such items, and 4.3.5. If such redesign results in retrofit kits being offered by Boeing or Boeing's suppliers, Boeing will provide such kits or cause such kits to be provided at no charge to Customer. Such retrofit kits will be provided as soon as practical, considering reasonable design and manufacturing lead times. Boeing will also reimburse, at Boeing's then existing Warranty labor rate, Customer's reasonable direct labor costs for incorporation of any such kit manufactured to Boeing's, or Boeing's supplier's, detailed design. Such reimbursement will be provided pursuant to Exhibit C, Product Assurance Document, of the AGTA. P.A. No. 2022 62 Delta Air Lines, Inc. 6-1162-RLL-2147 Page 9 4.3.6. *This confidential information has been omitted and filed separately with the Commission. 5. Corrective Action Conditions and Limitations. 5.1 If, with the intent of reducing Covered Maintenance Costs, Boeing or any supplier issues service bulletins, service letters or other written instructions or offers no-charge retrofit kits ("Correction"), Customer will comply with such instructions or install such kits within a period of 240 days after issuance of such instructions or receipt of such kits, at Customer's facility, or such longer period as may be mutually agreed by the parties. If Customer is otherwise required to complete the Correction and does not do so in accordance with requirements of this paragraph, all airframe maintenance costs which Boeing reasonably determines would have been eliminated if such Correction had been incorporated, will be subtracted from the Actual Maintenance Costs reported after expiration of such requirements. 5.2 Customer will promptly notify Boeing in writing of any variations in its maintenance cost accounting system or procedures which would have a materiel affect on Customer's reported Actual Maintenance Costs. Boeing will have the right to make adjustments to the Cumulative Average Target Maintenance Cost to reflect the effect of any such variations. 5.3 Upon reasonable notice to Customer, Boeing will have the right to audit all Actual Maintenance Costs reported by Customer, as well as the maintenance practices and procedures related thereto during the Program Term. Boeing will also have the right to disapprove costs it deems improperly reported. Boeing will provide Customer written notification of its disapproval of any such costs, and if Customer does not provide proof that such costs are properly chargeable within 60 days after such notification, Boeing's disapproval will be deemed final and conclusive and Boeing may deduct such costs from the computation of Actual Maintenance Costs. P.A. No. 2022 63 Delta Air Lines, Inc. 6-1162-RLL-2147 Page 10 5.4 Upon reasonable notice to Customer, Boeing may inspect Customer's maintenance facilities, programs and procedures. If Boeing recommends in writing reasonable changes to Customer's maintenance programs and procedures which would reduce Actual Maintenance Costs and Customer does not implement such changes or Customer delays implementing such changes beyond the period set forth in paragraph 5.1, Boeing will have the right to adjust the Actual Maintenance Costs that have been reported to deduct the increased maintenance costs which Boeing estimates resulted from Customer's failure or delay in implementing such changes. 5.5 The Actual Maintenance Cost will not include the following: (a) Costs arising from loss of, or damage to, any Covered Aircraft, or any system, accessory, equipment or part thereof. (b) Any taxes, duties, tariffs, surcharges, transportation, insurance interest or overhead. (c) The cost of initial or sustaining spare parts or the depreciation of such spare parts; costs resulting from any modification to the Covered Aircraft or any system, equipment, accessory or part thereof other than modifications described under paragraphs 4.3.5 and 5.1 herein. (d) Costs resulting from the negligent acts or omissions of Customer. (e) Costs resulting from the failure to comply with Boeing's or Boeing's suppliers' applicable written instructions for the operation, service, maintenance or overhaul of any Covered Aircraft, or any system, accessory, equipment or part thereof. (f) Costs attributable to loss of use, revenue or profit. (g) Costs of consumable fluids, including fuel. (h) Costs due to acts of God, war, armed hostilities, riots, fires, floods, earthquakes or serious accidents, Governmental acts or failure to act affecting materials, facilities or Aircraft needed for the maintenance of Covered Aircraft. P.A. No. 2022 64 Delta Air Lines, Inc. 6-1162-RLL-2147 Page 11 (i) Costs due to strikes or labor troubles causing cessation, slowdown or interruption of work related to the maintenance of Covered Aircraft. (j) Costs resulting from failure of or delay in transportation or inability, after due and timely diligence, to procure materials, systems, accessories, equipment or parts needed for the maintenance of Covered Aircraft. (k) Amounts for any part provided by Boeing or Boeing's suppliers to Customer at no charge. (l) Amounts equal to the difference between the reported price for any part and the reduced price for such part as provided by Boeing or Boeing's suppliers to Customer. (m) Amounts related to any warranty, maintenance cost guarantee, or similar agreement, for which there is a credit memorandum or other payment scheme, established in Customer's favor, and issued by Boeing or Boeing's suppliers to Customer. 5.6 The program will be suspended if during any Period the average utilization for the Covered Aircraft is less than 2,000 flight hours. The Program will resume on the first day of any subsequent Reporting Period during which the average utilization for the Covered Aircraft exceeds that set forth above. The Cumulative Average Reporting Cost as of any Reporting Period during the Program Term will exclude all Actual Maintenance Cost and Fleet Hours accumulated during any Reporting Period in which the program was suspended as provided above. The program will not be extended to reflect any period wherein it was suspended. 5.7 At Boeing's request, Customer will assign to Boeing, any of Customer's rights against the manufacturer of any equipment, accessory or part installed in the Covered Aircraft as Boeing may reasonably require to fulfill its obligations with respect to any corrective action provided by Boeing hereunder. 5.8 THIS LETTER AGREEMENT AND THE RIGHTS AND REMEDIES OF CUSTOMER AND OBLIGATIONS OF BOEING HEREIN ARE SUBJECT TO THE DISCLAIMER AND RELEASE, AND EXCLUSION OF CONSEQUENTIAL AND OTHER DAMAGES PROVISIONS OF EXHIBIT C, PRODUCT ASSURANCE DOCUMENT, OF THE AGTA. P.A. No. 2022 65 Delta Air Lines, Inc. 6-1162-RLL-2147 Page 12 If the foregoing correctly sets forth your understanding of our agreement with respect to the matters treated above, please indicate your acceptance and approval below. Very truly yours, THE BOEING COMPANY By /s/ R. B. Woodard ----------------------------------- Its President ----------------------------------- ACCEPTED AND AGREED TO: Date: October 21 , 1997 ------------------------- DELTA AIR LINES, INC. By /s/ Leo F. Mullin --------------------------------------------- Its President and Chief Executive Officer ----------------------------------------- Attachments P.A. No. 2022 66 Delta Air Lines, Inc. Attachment A to 6-1162-RLL-2147 Page 1 Attachment A - Adjustments For each reporting period, Boeing will calculate Target Maintenance Costs by revising the Projected Target Maintenance Cost to reflect actual data for the following parameters: Material Price Inflation Material prices will be adjusted using Producer Price Indexes as defined below. The Target Material Cost for a Reporting Period will be calculated by multiplying the projected target material cost by the ratio of the average index for the Reporting Period to the index related to the projected target material cost. The measure of material price inflation will be the Producer Price Index for "Aircraft Parts and Auxiliary Equipment, n.e.c." (Standard Industrial Classification Code 3728). This index will be obtained from the publication "Producer Prices and Price Indexes" published by the U.S. Department of Labor, Bureau of Labor Statistics or any comparable successor publication published by the U.S. Department of Labor, Bureau of Labor Statistics or any comparable successor agency. Labor Cost The projected target labor cost will be adjusted to reflect Customer's actual Labor Cost. The Target Labor Cost will be calculated by multiplying the Projected Target Labor Cost by the ratio of Customer's then-current Labor Rate to the Labor Rate used to calculate the projected target labor cost for that Reporting Period. Airframe Maintenance Performed by Others (Subcontracted Maintenance) The Projected Target Material Cost and Projected Target Labor Cost assume that Subcontracted Maintenance will be no more than the Cumulative Average Reported Cost as of any reporting period. If Subcontracted Maintenance amounts to more than the Cumulative Average Actual Maintenance Cost as of any reporting period, Boeing reserves the right to revise the Target Material Cost and Target Labor Cost for that Reporting Period accordingly. To adjust Subcontracted Maintenance to Customer's equivalent direct labor and direct material costs, Subcontracted Maintenance will be reduced by TBD percent before it is distributed to Direct Labor and Direct Material. P.A. No. 2022 67 Delta Air Lines, Inc. Attachment A to 6-1162-RLL-2147 Page 2 Covered Aircraft The Projected Target Maintenance Costs are based on the number of Covered Aircraft. If the number of Covered Aircraft changes during any Reporting Period, Boeing reserves the right to incorporate such change when calculating the Target Maintenance Costs for that Reporting Period. Delivery Schedule The Projected Target Maintenance Costs are based on the delivery schedule of Covered Aircraft as described in Article 2 of the Purchase Agreement. If the delivery schedule for the Covered Aircraft changes during any Reporting Period, Boeing reserves the right to incorporate such change when calculating the Target Maintenance Costs for that Reporting Period. Average Flight Time If the Actual Average Flight Time (AAFT) for any Reporting Period differs from the Projected Average Flight Time (PAFT) of * hours, the Target Material Cost (TMC) and Target Labor Cost (TLC) for that reporting period will be adjusted as follows: .65 + TMC for AAFT = TMC for PAFT X AAFT .35 ---------- .65 + PAFT .35 .54 + TLC for AAFT = TLC for PAFT X AAFT .46 ---------- .54 + PAFT .46 Note: The adjustment formula set forth above is obtained from the publication "Airframe Maintenance Analysis of IATA PPM (Production Performance Measurements) Maintenance Cost Data". Utilization *This confidential information as been omitted and filed separately with the Commission. P.A. No. 2022 68 Delta Air Lines, Inc. Attachment A to 6-1162-RLL-2147 Page 3 Covered Aircraft Configuration The Target Maintenance Cost set forth in this Program is based on the configuration for the Covered Aircraft as set forth in Exhibit A to the Purchase Agreement. Such Target Maintenance Cost may be adjusted by Boeing to appropriately reflect any changes to the actual configuration of the Covered Aircraft at the time of delivery thereof to Customer. Adjustments to such Target Maintenance Cost may also be made at any time during the Program Term to reflect any additional changes in the configuration of the Covered Aircraft. P.A. No. 2022 69 Delta Air Lines, Inc. Attachment B to 6-1162-RLL-2147 Page 1 To: Director - Product Assurance Contracts Boeing Commercial Airplane Group P.O. Box 3707 Mail Stop 76-02 Fax: 206-237-1706 Seattle, Washington 98124-2207 Subject: Letter Agreement No. 6-1162-RLL-2147 to Purchase Agreement No. 2022 Airframe Maintenance Cost Protection Program Reported herein are certain data required under paragraph 4.1.1 of the referenced Letter Agreement. Reporting Period No. --------- Beginning date ending date --------- ---------- Currency of the costs shown below: ------------ Direct Direct Subcontracted Actual Labor Material Maintenance Maintenance Costs (total cost) (total cost) (total cost) - -------------------------------------------------------------------------------- Scheduled Maintenance - -------------------------------------------------------------------------------- Non-Scheduled Maintenance - -------------------------------------------------------------------------------- Repair & Overhaul - -------------------------------------------------------------------------------- Modifications (ref. para. 4.3 & 5.1) - -------------------------------------------------------------------------------- Total The above labor costs are exclusive of time consumed by employees while waiting for work, traveling to or from work, training, vacation, sick leave, or in any other similar absences from the actual maintenance work. The above material costs exclude all costs described in paragraph 5 of the referenced Letter Agreement. Average per Average per Average Total per manhour flight number of aircraft Labor Rate Flight Time Covered Aircraft Flight Hours - -------------------------------------------------------------------------------- P.A. No. 2022 70 Delta Air Lines, Inc. Attachment B to 6-1162-RLL-2147 Page 2 The above labor rate excludes all fringe benefits, premium time allowances, social charges, business taxes and the like. DELTA AIR LINES, INC. By Date ---------------------------- -------------------------- Its ---------------------------- P.A. No. 2022 71 Delta Air Lines, Inc. Attachment C to 6-1162-RLL-2147 Page 1 To: DELTA AIR LINES, INC. Subject: Letter Agreement No. 6-1162-RLL-2147 to Purchase Agreement No. 2022 Airframe Maintenance Cost Protection Program Reported herein are certain data required under paragraph 4.2.1 of the referenced Letter Agreement. Reporting Period No. ------- Beginning date ending date --------- --------- Costs as reported by Customer /in foreign currency/: Actual Direct Direct Subcontracted Maintenance Costs Labor Material Maintenance - -------------------------------------------------------------------------------- Scheduled Maintenance - -------------------------------------------------------------------------------- Non-Scheduled Maintenance - -------------------------------------------------------------------------------- Repair & Overhaul - -------------------------------------------------------------------------------- Modifications Customer's costs with adjusted Subcontracted Maintenance (per Attachment B of the referenced Letter Agreement) in U.S. dollars. Actual Direct Direct Subcontracted Subcontracted Maintenance Costs Labor Material Labor Material - -------------------------------------------------------------------------------- Scheduled Maintenance - -------------------------------------------------------------------------------- Non-Scheduled Maintenance - -------------------------------------------------------------------------------- Repair & Overhaul - -------------------------------------------------------------------------------- Modifications - -------------------------------------------------------------------------------- Total P.A. No. 2022 72 Delta Air Lines, Inc. Attachment A to 6-1162-RLL-2147 Page 2 Actual Costs and Target Costs (per Attachment B of the referenced Letter Agreement) /in U.S. dollars/. Reporting Reporting Reporting Reporting Reporting Period 1 Period 2 Period 3 Period 4 Period 5 - ----------------------------------------------------------------------------------------------------------- Year dollars - ----------------------------------------------------------------------------------------------------------- Actual Labor - ----------------------------------------------------------------------------------------------------------- Actual Material - ----------------------------------------------------------------------------------------------------------- Actual Maintenance Cost - ----------------------------------------------------------------------------------------------------------- Fleet Hours - ----------------------------------------------------------------------------------------------------------- Cumulative Actual Maintenance Cost - ----------------------------------------------------------------------------------------------------------- Number of Covered Aircraft - ----------------------------------------------------------------------------------------------------------- Currency Exchange factor - ----------------------------------------------------------------------------------------------------------- Per man-hour Labor Rate - ----------------------------------------------------------------------------------------------------------- Material Inflation factor - ----------------------------------------------------------------------------------------------------------- Average Flight Time - ----------------------------------------------------------------------------------------------------------- Target Labor Cost - ----------------------------------------------------------------------------------------------------------- Target Material Cost - ----------------------------------------------------------------------------------------------------------- Target Maintenance Cost - ----------------------------------------------------------------------------------------------------------- Cumulative Target Maintenance Cost As of this Reporting Period, the Program is in compliance: Yes [ ] No [ ] Very truly yours, THE BOEING COMPANY Reported by ------------------------- Its ------------------------- Date ------------------------- P.A. No. 2022 73 [BOEING LETTERHEAD] 6-1162-RLL-2191 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: Multiple Aircraft Operating Weights Reference: Purchase Agreement No. 2022 (the Purchase Agreement) between The Boeing Company (Boeing) and Delta Air Lines, Inc. (Customer) relating to Model 737-632/-732/-832 aircraft (the Aircraft) This Letter Agreement amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreement. In this Letter Agreement, the term "Aircraft" means all Model 737-632 or 737-732 or 737-832 aircraft purchased by Customer under the Purchase Agreement . *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2022 74 Delta Air Lines, Inc. 6-1162-RLL-2191 Page 2 *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2022 75 Delta Air Lines, Inc. 6-1162-RLL-2191 Page 3 *This confidential information has been omitted and filed separately with the Commission. Very truly yours, THE BOEING COMPANY By /s/ R. B. Woodard --------------------------------------- Its President --------------------------------------- ACCEPTED AND AGREED TO: Date: October 21 , 1997 ------------------------------- DELTA AIR LINES, INC. By /s/ Leo F. Mullin --------------------------------------- Its President and Chief Executive Officer --------------------------------------- P.A. No. 2022 76 [BOEING LETTERHEAD] 6-1162-RLL-2233 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: Aircraft Performance Guarantees Reference: Purchase Agreement No. 2022 (the Purchase Agreement) between The Boeing Company (Boeing) and Delta Air Lines, Inc. (Customer) relating to Model 737-632/-732/-832 aircraft (the Aircraft) This Letter Agreement amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreement. Boeing agrees to provide Customer with the Performance Guarantees in Attachments A, B and C to this Letter Agreement. These guarantees are exclusive and expire upon Delivery of the Aircraft to Customer. Customer's remedies survive Delivery of the Aircraft. Very truly yours, THE BOEING COMPANY By /s/ R. B. Woodard --------------------------------------- Its President --------------------------------------- ACCEPTED AND AGREED TO: Date: October 21 , 1997 ------------------------------- DELTA AIR LINES, INC. By /s/ Leo F. Mullin --------------------------------------- Its President and Chief Executive Officer --------------------------------------- Attachment P.A. No. 2022 77 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 1 MODEL 737-632 PERFORMANCE GUARANTEES SECTION CONTENTS 1 * 2 * 3 * 4 * 5 * 6 * 7 * 8 * 9 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 78 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 2 1 * 2 * 2.1 * 2.2 * 2.3 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 79 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 3 2.4 * 2.5 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 80 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 4 2.6 * 2.6.1 * 2.6.2 * 2.6.3 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 81 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 5 2.7 * 2.7.1 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 82 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 6 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 83 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 7 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 84 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 8 2.7.2 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 85 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 9 2.7.3 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 86 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 10 2.7.4 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 87 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 11 2.7.5 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 88 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 12 2.7.6 *This confidential information has been omitted and filed separately with the Commission. 2.7.7 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 89 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 13 2.7.8 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 90 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 14 2.7.9 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 91 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 15 3 * 4 * 4.1 * 4.2 * 4.2.1 * 4.2.2 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 92 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 16 4.2.3 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 93 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 17 4.3 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 94 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 18 4.4 *This confidential information has been omitted and filed separately with the Commission. 4.5 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 95 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 19 5 * 6 * 6.1 * 6.2 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 96 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 20 7 * 7.1 * 7.2 * 7.3 * 7.4 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 97 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 21 7.5 * 7.6 * 7.7 * 7.8 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 98 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 22 7.9 * 7.10 * 7.11 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 99 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 23 7.12 * 8 * 8.1 * 8.2 * 8.3 * 8.4 * 8.5 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 100 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 24 8.6 * 8.7 * 8.7.1 * 8.7.2 * 8.7.3 * 8.7.4 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 101 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 25 8.7.5 * 8.8 * 8.9 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 102 Attachment A to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B22 Engines Page 26 8.10 * 8.11 * 9 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0632C 103 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 1 MODEL 737-632 PERFORMANCE GUARANTEES SECTION CONTENTS 1 * 2 * 3 * 4 * 5 * 6 * 7 * 8 * 9 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 104 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 2 1 * 2 * 2.1 * 2.2 * 2.3 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 105 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 3 2.4 * 2.5 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 106 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 4 2.6 * 2.6.1 * 2.6.2 * 2.6.3 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 107 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 5 2.7 * 2.7.1 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 108 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 6 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 109 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 7 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 110 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 8 2.7.2 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 111 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 9 2.7.3 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 112 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 10 2.7.4 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 113 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 11 2.7.5 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 114 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 12 2.7.6 *This confidential information has been omitted and filed separately with the Commission. 2.7.7 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 115 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 13 2.7.8 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 116 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 14 2.7.9 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 117 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 15 3 * 4 * 4.1 * 4.2 * 4.2.1 * 4.2.2 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 118 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 16 4.2.3 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 119 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 17 4.3 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 120 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 18 4.4 *This confidential information has been omitted and filed separately with the Commission. 4.5 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 121 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 19 5 * 6 * 6.1 * 6.2 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 122 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 20 7 * 7.1 * 7.2 * 7.3 * 7.4 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 123 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 21 7.5 * 7.6 * 7.7 * 7.8 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 124 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 22 7.9 * 7.10 * 7.11 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 125 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 23 7.12 * 8 * 8.1 * 8.2 * 8.3 * 8.4 * 8.5 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 126 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 24 8.6 * 8.7 * 8.7.1 * 8.7.2 * 8.7.3 * 8.7.4 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 127 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 25 8.7.5 * 8.8 * 8.9 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 128 Attachment B to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B24 Engines Page 26 8.10 * 8.11 * 9 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0633C 129 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 1 MODEL 737-832 PERFORMANCE GUARANTEES SECTION CONTENTS 1 * 2 * 3 * 4 * 5 * 6 * 7 * 8 * 9 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 130 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 2 1 * 2 * 2.1 * 2.2 * 2.3 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 131 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 3 2.4 * 2.5 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 132 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 4 2.6 * 2.6.1 * 2.6.2 * 2.6.3 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 133 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 5 2.7 * 2.7.1 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 134 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 6 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 135 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 7 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 136 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 8 2.7.2 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 137 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 9 2.7.3 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 138 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 10 2.7.4 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 139 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 11 2.7.5 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 140 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 12 2.7.6 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 141 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 13 2.7.7 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 142 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 14 2.7.8 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 143 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 15 2.7.9 * 2.7.10 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 144 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 16 2.7.11 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 145 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 17 2.7.12 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 146 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 18 3 * 4 * 4.1 * 4.2 * 4.2.1 * 4.2.2 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 147 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 19 4.2.3 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 148 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 20 4.3 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 149 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 21 4.4 *This confidential information has been omitted and filed separately with the Commission. 4.5 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 150 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 22 5 * 6 * 6.1 * 6.2 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 151 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 23 7 * 7.1 * 7.2 * 7.3 * 7.4 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 152 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 24 7.5 * 7.6 * 7.7 * 7.8 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 153 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 25 7.9 * 7.10 * 7.11 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 154 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 26 7.12 * 8 * 8.1 * 8.2 * 8.3 * 8.4 * 8.5 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 155 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 27 8.6 * 8.7 * 8.7.1 * 8.7.2 * 8.7.3 * 8.7.4 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 156 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 28 8.7.5 * 8.8 * 8.9 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 157 Attachment C to Letter Agreement No. 6-1162-RLL-2233 CFM56-7B26 Engines Page 29 8.10 * 8.11 * 9 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0634D 158 [BOEING LETTERHEAD] 6-1162-RLL-2240 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: *This confidential information has been omitted and filed separately with the Commission. Reference: Purchase Agreement No. 2022 (the Purchase Agreement) between The Boeing Company (Boeing) and Delta Air Lines, Inc. (Customer) relating to Model 737-632/-732/-832 aircraft (the Aircraft) This Letter Agreement amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement have the same meaning as in AGTA and the Purchase Agreement. *This confidential information has been omitted and filed separately with the Commission. Very truly yours, THE BOEING COMPANY By /s/ R. B. Woodard ------------------------------------------------- Its President ------------------------------------------------- ACCEPTED AND AGREED TO: Date: October 21 , 1997 -------------------------------- DELTA AIR LINES, INC. By /s/ Leo F. .Mullin ------------------------------------------------- Its President and Chief Executive Officer ------------------------------------------------- Attachment 159 *This confidential information has been omitted and filed separately with the Commission. * 160 TABLE OF CONTENTS Page Number ------ Article 1. * 1-1 Article 2. * 2-1 Article 3. * 3-1 Article 4. * 4-1 Article 5. * 5-1 Article 6. * 6-1 Article 7. * 7-1 Article 8. * 8-1 Article 9. * 9-1 Article 10. * 10-1 Article 11. * 11-1 Article 12. * 12-1 Article 13. * 13-1 Article 14. * 14-1 Article 15. * 16-1 Article A * A-1 Article B * B-1 Article C * C-1 Article D * D-1 *This confidential information has been omitted and filed separately with the Commission. (i) * 161 *This confidential information has been omitted and filed separately with the Commission. (ii) * 162 Article 1. *This confidential information has been omitted and filed separately with the Commission. 1-1 * 163 Article 2. *This confidential information has been omitted and filed separately with the Commission. 2-1 * 164 Article 3. *This confidential information has been omitted and filed separately with the Commission. 3-1 * 165 Article 4. *This confidential information has been omitted and filed separately with the Commission. 4-1 * 166 Article 5. *This confidential information has been omitted and filed separately with the Commission. 5-1 * 167 *This confidential information has been omitted and filed separately with the Commission. 5-2 * 168 *This confidential information has been omitted and filed separately with the Commission. 5-3 * 169 *This confidential information has been omitted and filed separately with the Commission. 5-4 * 170 Article 6. *This confidential information has been omitted and filed separately with the Commission. 6-1 * 171 Article 7. *This confidential information has been omitted and filed separately with the Commission. 7-1 * 172 *This confidential information has been omitted and filed separately with the Commission. 7-2 * 173 Article 8. *This confidential information has been omitted and filed separately with the Commission. 8-1 * 174 Article 9. *This confidential information has been omitted and filed separately with the Commission. 9-1 * 175 Article 10. *This confidential information has been omitted and filed separately with the Commission. 10-1 * 176 Article 11. *This confidential information has been omitted and filed separately with the Commission. 11-1 * 177 Article 12. *This confidential information has been omitted and filed separately with the Commission. 12-1 * 178 Article 13. *This confidential information has been omitted and filed separately with the Commission. 13-1 * 179 Article 14. *This confidential information has been omitted and filed separately with the Commission. 14-1 * 180 Article 15. *This confidential information has been omitted and filed separately with the Commission. 15-1 * 181 Exhibit A to * *This confidential information has been omitted and filed separately with the Commission. A-1 * 182 Exhibit A to * *This confidential information has been omitted and filed separately with the Commission. A-2 * 183 Exhibit B to * *This confidential information has been omitted and filed separately with the Commission. B-1 * 184 Attachment 1 to Exhibit B to * *This confidential information has been omitted and filed separately with the Commission. B-1-1 * 185 Attachment 2 to Exhibit B to * *This confidential information has been omitted and filed separately with the Commission. B-2-1 * 186 Attachment 2 to Exhibit B to * *This confidential information has been omitted and filed separately with the Commission. B-2-2 * 187 Exhibit C to * *This confidential information has been omitted and filed separately with the Commission. C-1 * 188 Exhibit D to * *This confidential information has been omitted and filed separately with the Commission. D-1 * 189 Exhibit D to * *This confidential information has been omitted and filed separately with the Commission. D-2 * 190 Exhibit D to * *This confidential information has been omitted and filed separately with the Commission. D-3 * 191 [BOEING LETTERHEAD] 6-1162-RLL-2400 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: Open Configuration Matters for the 737-632 and 737-732 Aircraft Reference: Purchase Agreement No. 2022 (the Purchase Agreement) between The Boeing Company (Boeing) and Delta Air Lines, Inc. relating to Model 737-632/-732 aircraft (the Aircraft) This Letter Agreement amends the Purchase Agreement. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreement. 1. Configuration Discussions 1.1 Configuration Schedule. In accordance with Article 4.2.2 of the AGTA Customer will advise Boeing 15 months prior to delivery of the first undefined, uncertified 737-632/-732 Aircraft. Following the 15 month notification by Customer, Boeing and Customer agree to establish a mutually agreeable schedule that will result in the completion of the final configuration of either a 737-632 or 737-732 on the fifteenth Business Day of the twelfth month prior to delivery of either a 737-632 or 737-732. In the discussions to establish the schedule, Customer and Boeing will develop a plan for identification, definition and selection by Customer of the Optional Features to be incorporated in Customer's Aircraft. 1.2 Customer's Detail Specification. The 737-632 and 737-732 Aircraft descriptions are as follows: 737-632 - Basic MTOW and thrust - Boeing 737-632 Configuration Specification D6-38808 revision F dated March 8, 1996, plus installation of CFM56-7B* engines with a MTOW of * pounds and thrust of * pounds. 737-632 - Maximum MTOW and thrust - Boeing 737-632 Configuration Specification D6-38808 revision F dated March 8, 1996, plus installation of CFM56-7B* engines with a MTOW of * pounds and thrust of * pounds. 737-732 - Basic MTOW and thrust - Boeing 737-732 Configuration Specification D6-38808 revision F dated March 8, 1996, plus installation of CFM56-7B* engines with a MTOW of * pounds and thrust of * pounds. *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2022 192 Delta Air Lines, Inc. 6-1162-RLL-2400 Page 2 737-732 - Maximum MTOW and thrust - Boeing 737-732 Configuration Specification D6-38808 revision F dated March 8, 1996, plus installation of CFM56-7B* engines with a MTOW of * pounds and thrust of * pounds. After Customer's selection of the Optional Features, Boeing will provide to Customer a Customer-unique configuration specification (Detail Specification). The Detail Specification will be comprised of the most recent version of the 737-600/-700 Configuration Specification developed by Boeing and the Optional Features agreed to be incorporated in the Aircraft by Boeing and Customer. 2. Price The Aircraft Basic Price for the 737-632 and 737-732 with the basic MTOW and thrust is: Model 737-632 737-732 Airframe Price * * Estimated Optional Features Price * * Aircraft Basic Price * * BFE Estimate * * The Aircraft Basic Price for the 737-632 and 737-732 with the maximum MTOW and thrust is: Model 737-632 737-732 Airframe Price * * Estimated Optional Features * * Price MTOW Portion of * * Optional Features Price Thrust Portion of * * Optional Features Price Aircraft Basic Price * * BFE Estimate * * *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2022 193 Delta Air Lines, Inc. 6-1162-RLL-2400 Page 3 3. Effect on Purchase Agreement. 3.1 Exhibit A. Upon completion of the configuration discussions referred to in Article 1.1 above, Boeing will provide to Customer an Exhibit A-1 for the 737-632 and an Exhibit A-2 for the 737-732 defining the configuration of the 737-632 and 737-732 Aircraft. 3.2 Tables . Tables 1, 2 and 3 to the Purchase Agreement will be provided to Customer reflecting acceptance of the Change Requests for the 737-632 and 737-732 Aircraft. Specifically, the Aircraft Basic Price and the Advance Payment Base Price of the Aircraft and the component parts of the Aircraft Basic Price and the Advance Payment Base Price will be included in such new Tables. 3.3 Performance Guarantees. The aircraft performance guarantees in Letter Agreement No. 6-1162-RLL-2233 are based on an estimate of the effect of Optional Features. Customer acknowledges that such performance guarantees will be revised by Boeing to incorporate the effect of Customer's final selection of Optional Features. 4. Purchase Agreement Amendment. Within 30 days after reaching agreement as to the final Aircraft Configuration, Boeing will provide Customer an amendment to the Purchase Agreement reflecting the effects of the configuration changes agreed to by the parties. Very truly yours, THE BOEING COMPANY By /s/ R. B. Woodard ----------------------------------------- Its President ---------------------------------------- ACCEPTED AND AGREED TO: Date: October 21 , 1997 ------------------------------- DELTA AIR LINES, INC. By /s/ Leo F. Mullin ----------------------------------------- Its President and Chief Executive Officer ---------------------------------------- P.A. No. 2022 194 [BOEING LETTERHEAD] 6-1162-RLL-2289 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: *This confidential information has been omitted and filed separately with the Commission. Reference: Purchase Agreement Nos. 2024 and 2025 (the Purchase Agreement) between The Boeing Company (Boeing) and Delta Air Lines, Inc. (Customer) relating to Model 767-332ER/-332 and 767-432ER aircraft (the Aircraft). This Letter Agreement amends and supplements the Purchase Agreements. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreements. *This confidential information has been omitted and filed separately with the Commission. Very truly yours, THE BOEING COMPANY By /s/ R. B. Woodard -------------------------------------------- Its President ------------------------------------------- ACCEPTED AND AGREED TO: Date: October 21 , 1997 ---------------------------------- DELTA AIR LINES, INC. By /s/ Leo F. Mullin -------------------------------------------- Its President and Chief Executive Officer ------------------------------------------- Attachment P.A. Nos. 2024 and 2025 195 *This confidential information has been omitted and filed separately with the Commission. * 196 TABLE OF CONTENTS Page Number ------ Article 1. * 1-1 Article 2. * 2-1 Article 3. * 3-1 Article 4. * 4-1 Article 5. * 5-1 Article 6. * 6-1 Article 7. * 7-1 Article 8. * 8-1 Article 9. * 9-1 Article 10. * 10-1 Article 11. * 11-1 Article 12. * 12-1 Article 13. * 13-1 Article 14. * 14-1 Article 15. * 16-1 Article A * A-1 Article B * B-1 Article C * C-1 Article D * D-1 *This confidential information has been omitted and filed separately with the Commission. (i) * 197 *This confidential information has been omitted and filed separately with the Commission. (ii) * 198 Article 1. *This confidential information has been omitted and filed separately with the Commission. 1-1 * 199 Article 2. *This confidential information has been omitted and filed separately with the Commission. 2-1 * 200 Article 3. *This confidential information has been omitted and filed separately with the Commission. 3-1 * 201 Article 4. *This confidential information has been omitted and filed separately with the Commission. 4-1 * 202 Article 5. *This confidential information has been omitted and filed separately with the Commission. 5-1 * 203 *This confidential information has been omitted and filed separately with the Commission. 5-2 * 204 *This confidential information has been omitted and filed separately with the Commission. 5-3 * 205 *This confidential information has been omitted and filed separately with the Commission. 5-4 * 206 Article 6. *This confidential information has been omitted and filed separately with the Commission. 6-1 * 207 Article 7. *This confidential information has been omitted and filed separately with the Commission. 7-1 * 208 *This confidential information has been omitted and filed separately with the Commission. 7-2 * 209 Article 8. *This confidential information has been omitted and filed separately with the Commission. 8-1 * 210 Article 9. *This confidential information has been omitted and filed separately with the Commission. 9-1 * 211 Article 10. *This confidential information has been omitted and filed separately with the Commission. 10-1 * 212 Article 11. *This confidential information has been omitted and filed separately with the Commission. 11-1 * 213 Article 12. *This confidential information has been omitted and filed separately with the Commission. 12-1 * 214 Article 13. *This confidential information has been omitted and filed separately with the Commission. 13-1 * 215 Article 14. *This confidential information has been omitted and filed separately with the Commission. 14-1 * 216 Article 15. *This confidential information has been omitted and filed separately with the Commission. 15-1 * 217 Exhibit A to * *This confidential information has been omitted and filed separately with the Commission. A-1 * 218 Exhibit A to * *This confidential information has been omitted and filed separately with the Commission. A-2 * 219 Exhibit B to * *This confidential information has been omitted and filed separately with the Commission. B-1 * 220 Attachment 1 to Exhibit B to * *This confidential information has been omitted and filed separately with the Commission. B-1-1 * 221 Attachment 2 to Exhibit B to * *This confidential information has been omitted and filed separately with the Commission. B-2-1 * 222 Attachment 2 to Exhibit B to * *This confidential information has been omitted and filed separately with the Commission. B-2-2 * 223 Exhibit C to * *This confidential information has been omitted and filed separately with the Commission. C-1 * 224 Exhibit D to * *This confidential information has been omitted and filed separately with the Commission. D-1 * 225 Exhibit D to * *This confidential information has been omitted and filed separately with the Commission. D-2 * 226 Exhibit D to * *This confidential information has been omitted and filed separately with the Commission. D-3 * 227 [BOEING LETTERHEAD] 6-1162-RLL-2292 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: *This confidential information has been omitted and filed separately with the Commission. Reference: Purchase Agreement No. 2025 (the Purchase Agreement) between The Boeing Company (Boeing) and Delta Air Lines, Inc. (Customer) relating to Model 767-432 aircraft (the Aircraft) This Letter Agreement amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreement. 1. *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2025 228 Delta Air Lines, Inc. 6-1162-RLL-2292 Page 2 *This confidential information has been omitted and filed separately with the Commission. Very truly yours, THE BOEING COMPANY By /s/ R. B. Woodard -------------------------------------------- Its President ----------------------------------------- ACCEPTED AND AGREED TO: Date: October 21 , 1997 ------------------ DELTA AIR LINES, INC. By /s/ Leo F. Mullin -------------------------------------------- Its President and Chief Executive Officer --------------------------------------- Attachment P.A. No. 2025 229 *This confidential information has been omitted and filed separately with the Commission. * 230 TABLE OF CONTENTS Page Number ------ Article 1. * 1-1 Article 2. * 2-1 Article 3. * 3-1 Article 4. * 4-1 Article 5. * 5-1 Article 6. * 6-1 Article 7. * 7-1 Article 8. * 8-1 Article 9. * 9-1 Article 10. * 10-1 Article 11. * 11-1 Article 12. * 12-1 Article 13. * 13-1 Article 14. * 14-1 Article 15. * 16-1 Article A * A-1 Article B * B-1 Article C * C-1 Article D * D-1 *This confidential information has been omitted and filed separately with the Commission. (i) * 231 *This confidential information has been omitted and filed separately with the Commission. (ii) * 232 Article 1. *This confidential information has been omitted and filed separately with the Commission. 1-1 * 233 Article 2. *This confidential information has been omitted and filed separately with the Commission. 2-1 * 234 Article 3. *This confidential information has been omitted and filed separately with the Commission. 3-1 * 235 Article 4. *This confidential information has been omitted and filed separately with the Commission. 4-1 * 236 Article 5. *This confidential information has been omitted and filed separately with the Commission. 5-1 * 237 Article 6. *This confidential information has been omitted and filed separately with the Commission. 6-1 * 238 Article 7. *This confidential information has been omitted and filed separately with the Commission. 7-1 * 239 Article 8. *This confidential information has been omitted and filed separately with the Commission. 8-1 * 240 Article 9. *This confidential information has been omitted and filed separately with the Commission. 9-1 * 241 Article 10. *This confidential information has been omitted and filed separately with the Commission. 10-1 * 242 Article 11. *This confidential information has been omitted and filed separately with the Commission. 11-1 * 243 Article 12. *This confidential information has been omitted and filed separately with the Commission. 12-1 * 244 Article 13. *This confidential information has been omitted and filed separately with the Commission. 13-1 * 245 Article 14. *This confidential information has been omitted and filed separately with the Commission. 14-1 * 246 Article 15. *This confidential information has been omitted and filed separately with the Commission. 15-1 * 247 Exhibit A to * *This confidential information has been omitted and filed separately with the Commission. A-1 * 248 Exhibit A to * *This confidential information has been omitted and filed separately with the Commission. A-2 * 249 Exhibit B to * *This confidential information has been omitted and filed separately with the Commission. B-1 * 250 Attachment 1 to Exhibit B to * *This confidential information has been omitted and filed separately with the Commission. B-1-1 * 251 Attachment 2 to Exhibit B to * *This confidential information has been omitted and filed separately with the Commission. B-2-1 * 252 Attachment 2 to Exhibit B to * *This confidential information has been omitted and filed separately with the Commission. B-2-2 * 253 Exhibit C to * *This confidential information has been omitted and filed separately with the Commission. C-1 * 254 Exhibit D to * *This confidential information has been omitted and filed separately with the Commission. D-1 * 255 Exhibit D to * *This confidential information has been omitted and filed separately with the Commission. D-2 * 256 Exhibit D to * *This confidential information has been omitted and filed separately with the Commission. D-3 * 257 [BOEING LETTERHEAD] 6-1162-RLL-2275 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: Multiple Aircraft Operating Weights Reference: Purchase Agreement No. 2025 (the Purchase Agreement) between The Boeing Company (Boeing) and Delta Air Lines, Inc. (Customer) relating to Model 767-432ER aircraft (the Aircraft) This Letter Agreement amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreement. In this Letter Agreement, the term "Aircraft" means the Model 767-432ER aircraft purchased by Customer under the Purchase Agreement. *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2025 258 Delta Air Lines, Inc. 6-1162-RLL-2275 Page 2 *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2025 259 Delta Air Lines, Inc. 6-1162-RLL-2275 Page 3 *This confidential information has been omitted and filed separately with the Commission. It is understood that a minimum of 60 days will be required for Boeing to make the change to the FAA approved Airplane Flight Manual elected by Customer. If the Customer requires the Airplane Flight Manual to be prepared in a different format required by the cognizant aviation authority of the proposed third party purchaser or lessee, prior coordination with Boeing will be required to determine price and offerability. Very truly yours, THE BOEING COMPANY By /s/ R. B. Woodard ---------------------------------------- Its President -------------------------------------- ACCEPTED AND AGREED TO: Date: October 21 , 1997 ------------------------------- DELTA AIR LINES, INC. By /s/ Leo F. Mullin ---------------------------------------- Its President and Chief Executive Officer -------------------------------------- Attachment P.A. No. 2025 260 Attachment to Delta Air Lines, Inc. 6-1162-RLL-2275 Page 1 *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2025 261 Attachment to Delta Air Lines, Inc. 6-1162-RLL-2275 Page 2 *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2025 262 Attachment to Delta Air Lines, Inc. 6-1162-RLL-2275 Page 3 *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2025 263 [BOEING LETTERHEAD] 6-1162-RLL-2281 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: Aircraft Performance Guarantees Reference: Purchase Agreement No. 2025 (the Purchase Agreement) between The Boeing Company (Boeing) and Delta Air Lines, Inc. (Customer) relating to Model 767-432ER aircraft (the Aircraft) This Letter Agreement amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreement. Boeing agrees to provide Customer with the Performance Guarantees in the Attachment to this Letter Agreement. These guarantees are exclusive and expire upon Delivery of the Aircraft to Customer. Customer's remedies survive delivery of the Aircraft. The Performance Guarantees in the Purchase Agreement do not include any effect of the boltless turbine. Very truly yours, THE BOEING COMPANY By /s/ R. B. Woodard ------------------------------------------ Its President ------------------------------------------ ACCEPTED AND AGREED TO: Date: October 21 , 1997 ------------------------------- DELTA AIR LINES, INC. By /s/ Leo. F. Mullin ------------------------------------------ Its President and Chief Executive Officer ------------------------------------------ Attachment P.A. No. 2025 264 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 1 MODEL 767-432ER PERFORMANCE GUARANTEES SECTION CONTENTS 1 * 2 * 3 * 4 * 5 * 6 * 7 * 8 * 9 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 265 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 2 1 * 2 * 2.1 * 2.2 * 2.3 * 2.3.1 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 266 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 3 2.3.2 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 267 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 4 2.3.3 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 268 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 5 2.4 * 2.5 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 269 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 6 2.6 * 2.6.1 * 2.6.2 * 2.6.3 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 270 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 7 2.7 * 2.7.1 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 271 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 8 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 272 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 9 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 273 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 10 2.7.2 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 274 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 11 2.7.3 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 275 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 12 2.7.4 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 276 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 13 2.7.5 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 277 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 14 2.7.6 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 278 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 15 2.7.7 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 279 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 16 2.7.8 *This confidential information has been omitted and filed separately with the Commission. 2.7.9 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 280 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 17 2.7.10 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 281 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 18 2.7.11 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 282 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 19 3 * 4 * 4.1 * 4.2 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 283 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 20 4.3 *This confidential information has been omitted and filed separately with the Commission. 4.4 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 284 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 21 5 *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 285 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 22 6 * 6.1 * 6.2 * 7 * 7.1 * 7.2 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 286 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 23 7.3 * 7.4 * 7.5 * 7.6 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 287 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 24 7.7 * 7.8 * 7.9 * 7.10 * 7.11 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 288 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 25 7.12 * 8 * 8.1 * 8.2 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 289 Attachment to Letter Agreement No. 6-1162-RLL-2281 CF6-80C2B7F Engines Page 26 8.3 * 8.4 * 8.5 * 8.6 * 8.7 * 8.8 * *This confidential information has been omitted and filed separately with the Commission. B-B111-M97-0637C 290 [BOEING LETTERHEAD] 6-1162-RLL-2284 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: Open Configuration Matters Reference: Purchase Agreement No. 2025 (the Purchase Agreement) between The Boeing Company (Boeing) and Delta Air Lines, Inc. (Customer) relating to Model 767-432ER aircraft (the Aircraft) This Letter Agreement amends the Purchase Agreement. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreement. 1. Final Configuration Discussions. 1.1 Final Configuration Schedule. Boeing and Customer agree to establish a schedule that will result in the completion of configuration of the Aircraft by May 1, 1998. In the discussions to establish the schedule, Customer and Boeing will identify and define the Optional Features to be incorporated into Customer's Aircraft. 1.2 Customer's Detail Specification. After Customer's selection of the Optional Features and engine model, Boeing will provide to Customer a Customer-unique configuration specification (Detail Specification). The Detail Specification will be comprised of the most recent version of the Configuration Specification developed by Boeing for a Model 767 Aircraft and the Appendix to that Configuration Specification which further defines the -400 model 767, and the Optional Features agreed to be incorporated in the Aircraft by Boeing and Customer. A reconciliation will be provided to Customer that identifies any differences between the Configuration Specification referenced in Exhibit A of the Purchase Agreement and the Configuration Specification initially used to develop the Detail Specification. 2. Price. *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2025 291 Delta Air Lines, Inc. 6-1162-RLL-2284 Page 2 *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2025 292 Delta Air Lines, Inc. 6-1162-RLL-2284 Page 3 *This confidential information has been omitted and filed separately with the Commission. 3. Effect on Purchase Agreement. 3.1 Exhibit A. Revisions to the 767-400 Configuration Specification developed by Boeing for a Model 767 Aircraft and the Appendix to that Configuration Specification (Revision A, dated June 6, 1997) which further defines the -400 model 767 developed by Boeing subsequent to the Execution Date will be provided to Customer in the form of an updated Configuration Specification and Appendix. The effects of all Optional Features which are mutually agreed upon between Boeing and Customer for incorporation into the Detail Specification for the Aircraft will be incorporated into Exhibit A of the Purchase Agreement by written amendment. 3.2 Tables. Tables 1, 2 and 3 to the Purchase Agreement will be revised to reflect revisions made to Exhibit A to the Purchase Agreement . Specifically, the Aircraft Basic Price and the Advance Payment Base Price of the Aircraft and the component parts of the Aircraft Basic Price and the Advance Payment Base Price will be included in such new Tables 1, 2 and 3. 3.3 Performance Guarantees. The aircraft performance guarantees in Letter Agreement No. 6-1162-RLL-2281 are based on an estimate of the effect of optional features. Customer acknowledges that such performance guarantees will be revised by Boeing to incorporate the effect of Customer's final selection of optional features. 4. Purchase Agreement Amendment. Within 30 days after reaching agreement as to the final Aircraft Configuration, Boeing and Customer will amend the Purchase Agreement to reflect the effects of the configuration changes agreed to by the parties. P.A. No. 2025 293 Delta Air Lines, Inc. 6-1162-RLL-2284 Page 4 Very truly yours, THE BOEING COMPANY By /s/ R. B. Woodard -------------------------------------------------- Its President -------------------------------------------------- ACCEPTED AND AGREED TO: Date: October 21 , 1997 ------------------------------- DELTA AIR LINES, INC. By /s/ Leo F. Mullin -------------------------------------------------- Its President and Chief Executive Officer -------------------------------------------------- P.A. No. 2025 294 [BOEING LETTERHEAD] 6-1162-RLL-2290 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: *This confidential information has been omitted and filed separately with the Commission. Reference: Purchase Agreement No. 2025 (the Purchase Agreement) between The Boeing Company (Boeing) and Delta Air Lines, Inc. (Customer) relating to Model 767-432ER aircraft (the Aircraft) This Letter Agreement amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreement. *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2025 295 Delta Air Lines, Inc. 6-1162-RLL-2290 Page 2 *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2025 296 Delta Air Lines, Inc. 6-1162-RLL-2290 Page 3 Very truly yours, THE BOEING COMPANY By /s/ R. B. Woodard ------------------------------------------------ Its President ------------------------------------------------ ACCEPTED AND AGREED TO: Date: October 21 , 1997 ----------------------------------- DELTA AIR LINES, INC. By /s/ Leo F. Mullin ------------------------------------------------ Its President and Chief Executive Officer ------------------------------------------------ Attachment P.A. No. 2025 297 [BOEING LETTERHEAD] September 15, 1997 VIA FAX: (404) 715-5494 Captain H.G. Alger Executive Vice President Operations Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Dear Harry: *This confidential information has been omitted and filed separately with the Commission. 298 *This confidential information has been omitted and filed separately with the Commission. Sincerely, /s/ John B. Hayhurst 299 Attachment A *This confidential information has been omitted and filed separately with the Commission. Rev-C 1 300 Attachment A *This confidential information has been omitted and filed separately with the Commission. Rev-C 2 301 Attachment B *This confidential information has been omitted and filed separately with the Commission. Rev.-B 1 302 Attachment B *This confidential information has been omitted and filed separately with the Commission. Rev.- B 2 303 *This confidential information has been omitted and filed separately with the Commission. 304 [BOEING LETTERHEAD] 6-1162-RLL-2287 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: Certification Flight Test Aircraft Reference: Purchase Agreement No. 2025 (the Purchase Agreement) between The Boeing Company (Boeing) and Delta Air Lines (Customer) relating to Model 767-432ER aircraft (the Aircraft) This Letter Agreement amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreement. It is understood that three (3) of Customer's Model 767-432ER Aircraft (Test Aircraft) will be used by Boeing in its certification flight test program, for obtaining the FAA Type and Airworthiness Certificates required under Article 6 of the AGTA, prior to delivery to Customer. Boeing will not use the Test Aircraft for more than eight hundred (800) flight test hours without the prior written consent of Customer. Customer agrees to accept delivery of each of the Test Aircraft without any reduction in the Aircraft Price on account of the depreciation and wear and tear resulting from such testing, subject to the terms and conditions set forth below. 1. Aircraft Refurbishment. Boeing shall refurbish each Test Aircraft prior to delivery to Customer to ensure such Test Aircraft complies with the Detail Specification. Reasonable wear and tear shall be permissible in all areas of the Test Aircraft except interior areas exposed to passenger view. Such interior areas shall be in a condition, at time of delivery to Customer, comparable to the same areas of other Model 767-432ER non test Aircraft delivered to Customer in the same time period as the Test Aircraft. 2. Production Record Revision and Service Bulletin Incorporation. During the refurbishment of each Test Aircraft, Boeing will incorporate therein all applicable Production Record Revisions (PRR's) and Service Bulletins which are released by Boeing for production incorporation in other Model 767-432ER Aircraft scheduled for delivery to Customer prior to scheduled delivery of P.A. No. 2025 305 Delta Air Lines, Inc. 6-1162-RLL-2287 Page 2 the Test Aircraft, except for any such PRR's and/or Service Bulletins which Boeing determines, and Customer agrees, are impracticable to retrofit on the Test Aircraft. Customer's agreement shall not be unreasonably withheld. Any reasonable delay in the delivery of any of the Test Aircraft resulting from the incorporation of such PRR's and/or Service Bulletins shall be an Excusable Delay within the meaning of Article 10 of the AGTA . Boeing will review its plans for incorporation of such PRR's and Service Bulletins with Customer prior to the refurbishment of the Test Aircraft and if the reason for not incorporating any such PRR or Service Bulletin is the unavailability of retrofit kits to Customer, Boeing will furnish such retrofit kits to Customer at no charge as soon as they can reasonably be made available and Boeing shall reimburse Customer for its direct labor to install such kits at the then current Warranty Labor Rate. 3. Warranty. The Boeing warranty for airframe and components of each Test Aircraft shall run full term from delivery of each Test Aircraft. If any Boeing supplier, except engine manufacturer, refuses to honor any Customer valid warranty claim solely on the basis of use or time expiration relating to flight test or refurbishment, Boeing shall assume responsibility for such claim using the supplier warranty terms and conditions as though the warranty period began with delivery of the Test Aircraft. 4. Wheels, Tires and Brakes. Boeing shall install new tires, wheels and brakes on each Test Aircraft, after such flight test and prior to delivery of each Test Aircraft. 5. Accomplishment of "C" Check. Boeing will accomplish a Boeing-recommended "C" Check or equivalent on each Test Aircraft prior to delivery thereof. 6. List of Greases, Oils and Other Fluids. Boeing will provide Buyer in a timely manner a list of part and/or specification numbers and suppliers of the greases, oils and other fluids used to service the Test Aircraft during the flight test program. P.A. No. 2025 306 Delta Air Lines, Inc. 6-1162-RLL-2287 Page 3 *This confidential information has been omitted and filed separately with the Commission. 9. Other Terms and Conditions. All terms and conditions relating to the manufacture, purchase and sale of the Test Aircraft as set forth in the Purchase Agreement shall remain in full force and effect except as amended by the provisions herein. P.A. No. 2025 307 Delta Air Lines, Inc. 6-1162-RLL-2287 Page 4 10. Flight Test Standby Spares. If applicable, in accordance with the provisions of Supplemental Exhibit BFE/CDSPE/SPE/CSE to the Purchase Agreement, Customer and/or Boeing shall provide BFE/CDSPE/SPE/CSE Standby Spares for Test Aircraft in the flight test program in accordance with requirements mutually agreed to by Boeing and Customer. The identification and scheduled requirement dates for such BFE/CDSPE/SPE/CSE Standby Spares will be identified by Boeing in the BFE Document referenced in Supplemental Exhibit BFE/CDSPE/SPE/CSE to the Purchase Agreement. Upon completion of the flight test program, any BFE standby spares provisioned for flight test shall be allocated to fulfill open production requirements for Customer's Aircraft, or returned to Customer, at Customer's option. Very truly yours, THE BOEING COMPANY By /s/ R. B. Woodard -------------------------------------- Its President -------------------------------------- ACCEPTED AND AGREED TO: Date: October 21 , 1997 --------------------------- DELTA AIR LINES, INC. By /s/ Leo F. Mullin -------------------------------------- Its President and Chief Executive Officer -------------------------------------- P.A. No. 2025 308 [BOEING LETTERHEAD] 6-1162-RLL-2420 Delta Air Lines, Inc. Hartsfield Atlanta International Airport Atlanta, Georgia 30320 Subject: *This confidential information has been omitted and filed separately with the Commission. Reference: Purchase Agreement No. 2025 (the Purchase Agreement) between The Boeing Company (Boeing) and Delta Air Lines (Customer) relating to Model 767-432ER aircraft (the Aircraft) This Letter Agreement amends and supplements the Purchase Agreement. All terms used but not defined in this Letter Agreement have the same meaning as in the AGTA and the Purchase Agreement. 1. Model 767-400ER Pilot Type Rating. Boeing has established that the same pilot type rating for the 767-400ER and the current 767-300ER aircraft is a major program objective. Boeing is confident that the foregoing objective is attainable and Boeing will use its best reasonable efforts to achieve the objective. *This confidential information has been omitted and filed separately with the Commission. P.A. No. 2025 309 Delta Air Lines, Inc. 6-1162-RLL-2420 Page 2 Very truly yours, THE BOEING COMPANY By /s/ R. B. Woodard ------------------------------------- Its President ------------------------------------- ACCEPTED AND AGREED TO: Date: October 21 , 1997 ----------------------------- DELTA AIR LINES, INC. By /s/ Leo F. Mullin --------------------------------------- Its President and Chief Executive Officer ------------------------------------- P.A. No. 2025