Supplemental Engine Escalation and Warranty Agreement (Exhibit EE1) to Purchase Agreement No. 3219 between The Boeing Company and American Airlines, Inc.

This supplemental agreement is between The Boeing Company and American Airlines, Inc. It outlines terms related to engine price adjustments (escalation), values to be used if certain items are unavailable, and the engine warranty and product support plan for aircraft covered under Purchase Agreement No. 3219. Many specific terms are confidential, but the agreement ensures American Airlines receives defined warranty coverage and support for its Boeing aircraft engines, with mechanisms for price changes and contingencies if certain values or items are not available.