The government is seeking sources capable of providing repair, manufacturing, and engineering services for the AN/GSM-397 ESTS Interface Test Adapters supporting the F-15 aircraft. The current contract expires on 9 September 2028, and the government lacks proprietary technical data needed to perform the work independently. No budget amount is specified in the description. The location for performance of services is not mentioned. This is a market research request for information (RFI), not a solicitation for award.