Exhibit 10.4 Supplemental Agreement No. 9 to Purchase Agreement No. 1951 between The Boeing Company and Continental Airlines, Inc. Relating to Boeing Model 737 Aircraft THIS SUPPLEMENTAL AGREEMENT, entered into as of February 18, 1999, by and between THE BOEING COMPANY, a Delaware corporation with its principal office in Seattle, Washington, (Boeing) and CONTINENTAL AIRLINES, INC., a Delaware corporation with its principal office in Houston, Texas (Buyer); WHEREAS, the parties hereto entered into Purchase Agreement No. 1951 dated July 23, 1996 (the Agreement), as amended and supplemented, relating to Boeing Model 737-500, 737-600, 737-700, 737-800, and 737-900 aircraft (the Aircraft); and WHEREAS, Boeing and Buyer have agreed on a method for dealing with delayed Aircraft to be delivered in 1999,and WHEREAS, Boeing and Buyer have mutually agreed to amend the Agreement to incorporate the effect of these and certain other changes; NOW THEREFORE, in consideration of the mutual covenants herein contained, the parties agree to amend the Agreement as follows: 1. Table of Contents and Articles: Remove and replace, in its entirety, the "Table of Contents", with the Table of Contents attached hereto, to reflect the changes made by this Supplemental Agreement No. 9. 2. Letter Agreements: Add new Letter Agreement 6-1162-DMH-680, "Delivery Delay Resolution Program", attached hereto, to reflect the agreement between Buyer and Boeing regarding delayed aircraft to be delivered in 1999. The Agreement will be deemed to be supplemented to the extent herein provided as of the date hereof and as so supplemented will continue in full force and effect. EXECUTED IN DUPLICATE as of the day and year first written above. THE BOEING COMPANY CONTINENTAL AIRLINES, INC. By: /s/ D. M. Hurt By: /s/ Brian Davis Its: Attorney-In-Fact Its: Vice President TABLE OF CONTENTS Page SA Number Number ARTICLES 1. Subject Matter of Sale. . . . . . . . . . . 1-1 SA 5 2. Delivery, Title and Risk of Loss . . . . . . . . . . . . . . . . . . 2-1 3. Price of Aircraft . . . . . . . . . . . . . 3-1 SA 5 4. Taxes . . . . . . . . . . . . . . . . . . . 4-1 5. Payment . . . . . . . . . . . . . . . . . . 5-1 6. Excusable Delay . . . . . . . . . . . . . . 6-1 7. Changes to the Detail Specification . . . . 7-1 SA 5 8. Federal Aviation Requirements and Certificates and Export License . . . . . . 8-1 SA 5 9. Representatives, Inspection, Flights and Test Data . . . . . . . . . . . 9-1 10. Assignment, Resale or Lease . . . . . . . . 10-1 11. Termination for Certain Events. . . . . . . 11-1 12. Product Assurance; Disclaimer and Release; Exclusion of Liabilities; Customer Support; Indemnification and Insurance . . . . . . . . . . . . . . . 12-1 13. Buyer Furnished Equipment and Spare Parts . . . . . . . . . . . . . . . . 13-1 14. Contractual Notices and Requests. . . . . . 14-1 15. Miscellaneous . . . . . . . . . . . . . . . 15-1 TABLE OF CONTENTS Page SA Number Number TABLES 1. Aircraft Deliveries and Descriptions - 737-500. . . . . . . . . . . T-1 SA 3 Aircraft Deliveries and Descriptions - 737-700. . . . . . . . . . . T-2 SA 8 Aircraft Deliveries and Descriptions - 737-800. . . . . . . . . . . T-3 SA 7 Aircraft Deliveries and Descriptions - 737-600. . . . . . . . . . . T-4 SA 4 Aircraft Deliveries and Descriptions - 737-900. . . . . . . . . . . T-5 SA 5 EXHIBITS A-1 Aircraft Configuration - Model 737-724. . . SA 2 A-2 Aircraft Configuration - Model 737-824. . . SA 2 A-3 Aircraft Configuration - Model 737-624. . . SA 1 A-4 Aircraft Configuration - Model 737-524. . . SA 3 A-5 Aircraft Configuration - Model 737-924. . . SA 5 B Product Assurance Document. . . . . . . . . SA 1 C Customer Support Document - Code Two - Major Model Differences . . . . . . . . . . SA 1 C1 Customer Support Document - Code Three - Minor Model Differences . . . . . . . . . . SA 1 D Aircraft Price Adjustments - New Generation Aircraft (1995 Base Price) . . . SA 1 D1 Airframe and Engine Price Adjustments - Current Generation Aircraft . . . . . . . . SA 1 D2 Aircraft Price Adjustments - New Generation Aircraft (1997 Base Price) . . . SA 5 E Buyer Furnished Equipment Provisions Document . . . . . . . . . . . . SA 5 F Defined Terms Document. . . . . . . . . . . SA 5 TABLE OF CONTENTS SA Number LETTER AGREEMENTS 1951-1 Not Used. . . . . . . . . . . . . . . 1951-2R3 Seller Purchased Equipment. . . . . . SA 5 1951-3R5 Option Aircraft-Model 737-824 Aircraft SA 8 1951-4R1 Waiver of Aircraft Demonstration. . . SA 1 1951-5R2 Promotional Support - New Generation. SA 5 Aircraft 1951-6 Configuration Matters . . . . . . . . 1951-7R1 Spares Initial Provisioning . . . . . SA 1 1951-8R2 Escalation Sharing - New Generation Aircraft. . . . . . . . . . . . . . . SA 4 1951-9R3 Option Aircraft-Model 737-724 Aircraft SA 7 1951-11R1 Escalation Sharing-Current Generation Aircraft. . . . . . . . . . . . . . . SA 4 1951-12 Option Aircraft - Model 737-924 Aircraft SA 5 1951-13 Configuration Matters - Model 737-924 SA 5 TABLE OF CONTENTS SA Number RESTRICTED LETTER AGREEMENTS 6-1162-MMF-295 Performance Guarantees - Model 737-724 Aircraft. . . . . . 6-1162-MMF-296 Performance Guarantees - Model 737-824 Aircraft. . . . . . 6-1162-MMF-308R3 Disclosure of Confidential . SA 5 Information 6-1162-MMF-309R1 [CONFIDENTIAL MATERIAL OMITTED SA 1 AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] 6-1162-MMF-311R3 [CONFIDENTIAL MATERIAL OMITTED SA 5 AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] 6-1162-MMF-312R1 Special Purchase Agreement Provisions. . . . . . . . . SA 1 6-1162-MMF-319 Special Provisions Relating to the Rescheduled Aircraft. . 6-1162-MMF-378R1 Performance Guarantees - Model 737-524 Aircraft. . . . . . SA 3 6-1162-GOC-015 [CONFIDENTIAL MATERIAL OMITTED SA 2 AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] 6-1162-GOC-131R2 Special Matters . . . . . . . SA 5 6-1162-DMH-365 Performance Guarantees - Model 737-924 Aircraft. . . . . . SA 5 6-1162-DMH-624 [CONFIDENTIAL MATERIAL OMITTED SA 8 AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] 6-1162-DMH-680 Delivery Delay Resolution Program SA 9 TABLE OF CONTENTS SUPPLEMENTAL AGREEMENTS DATED AS OF: Supplemental Agreement No. 1 . . . . . . . . . . October 10,1996 Supplemental Agreement No. 2 . . . . . . . . . . March 5, 1997 Supplemental Agreement No. 3 . . . . . . . . . . July 17, 1997 Supplemental Agreement No. 4 . . . . . . . . . . October 10,1997 Supplemental Agreement No. 5 . . . . . . . . . . May 21,1998 Supplemental Agreement No. 6 . . . . . . . . . . July 30,1998 Supplemental Agreement No. 7 . . . . . . . . . . November 12,1998 Supplemental Agreement No. 8 . . . . . . . . . . December 7,1998 Supplemental Agreement No. 9 . . . . . . . . . . February 18,1999 February 18, 1999 6-1162-DMH-680 Continental Airlines, Inc. 1600 Smith Street Houston, TX 77002 Subject: Delivery Delay Resolution Program Reference: (a) Purchase Agreement No. 1951 between The Boeing Company (Boeing) and Continental Airlines, Inc. (Customer) relating to Model 737 aircraft (b) Purchase Agreement No. 1783 between Boeing and Customer relating to Model 757 aircraft (c) Letter Agreement 6-1162-DMH-678 dated December 29, 1998, Subject: 1998 Delivery Delay Settlement Ladies and Gentlemen: This Letter Agreement amends and supplements the above reference (a) and (b) Purchase Agreements (the Agreements). All terms used but not defined in this Letter Agreement have the same meaning as in the Agreements. 1. Revised Delivery of Aircraft. Boeing has found it necessary to reschedule the delivery month of certain Aircraft ( the Delayed Aircraft) as set forth below: [CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] Boeing shall deliver each Delayed Aircraft in accordance with the terms of the Agreements during or before the Revised Schedule Month specified above. The calendar interval between the original schedule and revised schedule described above is the "Delay Period." [CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] 2. Aircraft Purchase Price. [CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] 3. Advance Payments Adjustments for Aircraft. [CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT] 4. Monetary Adjustment for Delivery Delay. Boeing will pay to Customer on the date of delivery the settlement amount calculated from the table provided in Attachment A hereto for each day of delay, beginning with the first day of the month following the Original Scheduled Month to and including the day prior to the date for delivery of each such Delayed Aircraft. The settlement amount, so calculated, will be provided to Customer in the form of a credit memorandum, which amount may be used for Boeing goods and services or may be applied against the purchase price of the Delayed Aircraft. 5. Purchase Agreement Revision. Except as specifically set forth in this Letter Agreement, the rights and obligations of the parties under the terms and conditions of the Agreements, including the provisions of Article 6, Excusable Delay, remain in full force and effect. 6. EXCLUSIVE REMEDY. THE OBLIGATIONS OF BOEING EXPRESSLY SET FORTH IN THIS LETTER AGREEMENT ARE EXCLUSIVE AND IN SUBSTITUTION FOR, AND CUSTOMER HEREBY WAIVES, RELEASES AND RENOUNCES ALL OTHER OBLIGATIONS AND LIABILITIES OF BOEING AND ALL OTHER RIGHTS, CLAIMS AND REMEDIES OF CUSTOMER AGAINST BOEING, EXPRESS OR IMPLIED, ARISING BY LAW OR OTHERWISE WITH RESPECT TO THE DELAY IN DELIVERY OF THE DELAYED AIRCRAFT. BOEING'S PERFORMANCE OF ITS OBLIGATIONS HEREUNDER SHALL CONSTITUTE FULL AND FINAL SETTLEMENT AND SATISFACTION OF ALL CLAIMS OR CAUSES OF ACTION OF CUSTOMER AGAINST BOEING RELATING TO THE DELAY IN DELIVERY OF THE DELAYED AIRCRAFT AND WILL BE REFLECTED IN A REDUCED INVOICE AMOUNT OR A CREDIT MEMORANDUM. 7. Confidential Treatment. Customer understands that certain commercial and financial information contained in this Letter Agreement and the attachments hereto are considered by Boeing as confidential. Customer agrees that it will treat this Letter Agreement and the information contained herein as confidential and will not, without the prior written consent of Boeing, disclose this Letter Agreement or any information contained herein to any other person or entity except to the extent required by law or governmental regulation. Very truly yours, THE BOEING COMPANY By /s/ D. M. Hurt Its Attorney-In-Fact ACCEPTED AND AGREED TO this Date: February 18, 1999 CONTINENTAL AIRLINES, INC. By /s/ Brian Davis Its Vice President Attachment A to Letter Agreement No. 6-1162-DMH-680 COMPENSATION TABLE The following table identifies the daily amount Boeing is required to pay in settlement to compensation Customer for the delayed delivery. [CONFIDENTIAL MATERIAL OMITTED AND FILED SEPARATELY WITH THE SECURITIES AND EXCHANGE COMMISSION PURSUANT TO A REQUEST FOR CONFIDENTIAL TREATMENT]