This presolicitation notice is for depot-level repairs, spare part manufacturing, and technical support for APX-119 IFF Radar Transponder units, with operations expected to continue through 2030 and beyond. The contract will be a one-year, Firm Fixed Price, Requirements Indefinite Delivery Contract, with orders possible from approximately September 2, 2026, to September 2, 2027, plus a potential six-month extension. Performance of services will occur at the contractor’s or a subcontractor’s facility, with the contractor providing all materials, support equipment, and tools. The government intends to award this on a sole-source basis to Raytheon, as it does not own or have access to the necessary data for these non-commercial items. No budget amount is specified in the notice.