The F-35 Lightning II Joint Program Office intends to issue an order under Basic Ordering Agreement (BOA) N00019-22-G-0001 on a sole source basis to Raytheon Technologies Corporation, Pratt and Whitney Military Engines, East Hartford, CT in support of the F135 Component Improvement Program.  The order includes work scope for calendar year (CY) 2025 Engineering Project Descriptions (EPDs) to procure supplies and services to provide engineering support for in-service engines to maintain flight safety; to correct service revealed deficiencies; to improve system operational readiness, reliability, maintainability, and affordability; and to test engines and components to their full capable life to prove safety and discover issues.  This acquisition is being pursued on a sole source basis under the statutory authority of 10 U.S.C. 3204(a)(1), as implemented by Federal Acquisition Regulation (FAR) 6.302-1, Only one responsible source and no other supplies or services will satisfy agency requirements.  Raytheon Technologies Corporation, Pratt and Whitney Military Engines, is the original designer, developer, and manufacturer of the F135 propulsion system.  The BOA Order award is anticipated by the end of the first quarter of fiscal year 2025 and supports the F-35 U.S. Services, Cooperative Program Partners, and Foreign Military Sales Customers.  This notice of intent is neither a request for proposal nor a solicitation of offers.  All responsible sources may submit a capability statement, proposal, or quotation, which shall be considered by the U.S. Government (USG).  The USG reserves the right to process this procurement action on a sole source basis.  For availability of F135 Propulsion System subcontracting opportunities, contact Raytheon Technologies Corporation, Pratt and Whitney Military Engines, Attn: Kristina Lenda, 400 Main Street, East Hartford, CT, 06118.