This is a market research Request for Information (RFI) from the U.S. Air Force to identify sources capable of retrofitting four Joint First Aid Kits (JFAK) into the MH-139A aircraft post-production. The government seeks a mounting solution that is secure, accessible without tools, and standardized across the cabin, with a preference for high fuselage locations. Vendors must provide their own JFAK units for fit-testing at a government-designated facility and demonstrate the ability to obtain an FAA Supplemental Type Certificate (STC) and deliver engineering data for a military airworthiness release. No budget information is specified, and the location for performance of services is not detailed beyond a government-designated facility. No submission timelines are provided as this is an RFI, not a solicitation.