Exhibit 10.43 ------------- CHANGE ORDER NO. 10A DATED November 6, 1998 TO PURCHASE AGREEMENT NO. 1663 BETWEEN THE BOEING COMPANY AND UNITED AIR LINES, INC. THIS CHANGE ORDER PERTAINS TO BLOCK B "A"-MARKET AIRCRAFT AND [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] Purchase Agreement No. 1663, dated December 18, 1990 between The Boeing Company and United Air Lines, Inc. as previously amended (the Agreement) is hereby further amended as follows: I. Effect of Changes on Exhibit A-3 (Detail Specification). ------------------------------------------------------- The attached Price Tabulation including the effects of the changes listed shall be incorporated into Detail Specification [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT]. NOTE: The Original Release of Detail Specification [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] had not been completed at the time of signing of this Change Order 10A. Boeing will provide such revision within ninety (90) days of execution of this Change Order 10A. II. Effect of Changes on the Purchase Agreement (Except Exhibit A-3). ---------------------------------------------------------------- The effects of the foregoing changes, except Rapid Revisions, are as follows: A. Delivery Schedule. ----------------- There is no change to the Aircraft delivery schedule as set forth in Article 2.1 of the Agreement on account of the attached changes. P.A. 1663 Change Order No. 10A to Purchase Agreement No. 1663 Page 2 B. Aircraft Price. -------------- The Basic Price of each affected Model 777-222 "A" Market Aircraft as set forth in Article 3 of the Agreement is adjusted on account of the foregoing changes as follows: Contract Delivery Month Per Aircraft Price Adjustment [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EX- CHANGE COMMISSION PURSUANT TO A REQUEST FOR CON- FIDENTIAL TREATMENT] ______________________________ _____________________________ [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] C. Advance Payment Base Price. -------------------------- The effects of the attached Weight and Price Tabulation are already included in the Advance Payment Base Prices set forth in Article 5.1 of the Agreement for the affected Aircraft. SIGNED as of the day and year first above written. ********************** THE BOEING COMPANY UNITED AIR LINES, INC. By /s/ Brian R. Belka By /s/ Douglas A. Hacker ------------------ --------------------- Douglas A. Hacker Its Attorney-in-Fact Its Senior Vice President and ---------------- ------------------------- Chief Financial Officer P.A. 1663 Attachment to Change Order No. 10A to Purchase Agreement No. 1663 Page 1 of 8 Price Tabulation UAL Model 777-222 Aircraft Block B "A" Market Aircraft and[*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] Changes Change Change Engineering Change Number Title Tab Block Price (AINs) [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] __________ _________ ___________ ______________ [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] P.A. 1663 Attachment to Change Order No. 10A to Purchase Agreement No. 1663 Page 2 of 8 Change Change Engineering Change Number Title Tab Block Price (AINs) [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] __________ _________ ___________ ______________ [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] P.A. 1663 Attachment to Change Order No. 10A to Purchase Agreement No. 1663 Page 3 of 8 Change Change Engineering Change Number Title Tab Block Price (AINs) [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] __________ _________ ___________ ______________ [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] P.A. 1663 Attachment to Change Order No. 10A to Purchase Agreement No. 1663 Page 4 of 8 Change Change Engineering Change Number Title Tab Block Price (AINs) [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] __________ _________ ___________ ______________ [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] P.A. 1663 Attachment to Change Order No. 10A to Purchase Agreement No. 1663 Page 5 of 8 Change Change Engineering Change Number Title Tab Block Price (AINs) [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] __________ _________ ___________ ______________ [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] P.A. 1663 Attachment to Change Order No. 10A to Purchase Agreement No. 1663 Page 6 of 8 Change Change Engineering Change Number Title Tab Block Price (AINs) [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] __________ _________ ___________ _______________ [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] P.A. 1663 Attachment to Change Order No. 10A to Purchase Agreement No. 1663 Page 7 of 8 Change Change Engineering Change Number Title Tab Block Price (AINs) [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] __________ _________ ___________ ______________ [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] P.A. 1663 Attachment to Change Order No. 10A to Purchase Agreement No. 1663 Page 8 of 8 Total Weight Change Engineering Tab Block MEW OEW [*CONFIDENTIAL (SEE NOTE 1) (SEE NOTE 1) MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] [*CONFIDENTIAL (SEE NOTE 1) (SEE NOTE 1) MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] NOTE 1: Weight change data was not completed at the time of signing this Change Order. Weights will be provided to Buyer not later than 30 days after the date of execution of this Change Order. Total Price Change Engineering Tab Block Total Price Per Aircraft [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] _________________________ __________________________ [*CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] P.A. 1663