The Government is seeking sources capable of providing repair, manufacturing, engineering, software support, and program management for the AN/GSM-397 ESTS and associated F-15 aircraft components, but does not possess the proprietary technical data needed to perform the work independently. This is a market research request for information (RFI), not a solicitation for proposals, and the Government will not pay for responses. Respondents must demonstrate technical capability, relevant experience, and an approach for accessing proprietary data, with responses due by close of business on 31 July 2026. The contractor must furnish all materials, support equipment, tooling, software, and engineering support required. No budget information or location for performance of services is specified.