The Air Force is conducting market research via a Sources Sought Synopsis to identify potential sources for a new-manufacture spares procurement of an F-15 heat exchanger, NSN 1660-01-662-9212, P/N 2342146-2-1, with an estimated requirement of 4 each. Performance is at Tinker AFB, OK 73145. Interested vendors must register as interested participants and may need to complete a Source Approval Request package, including qualification requirements and engineering data where applicable; the Government may use responses to determine whether the effort can be competitive or a small business set-aside and may consider breaking the requirement out by airframe. The applicable NAICS code is 336413 with a 1,250-employee size standard, and all business types are invited to respond. No solicitation is currently available, and this notice is for informational/planning purposes only with no funds available for the requested information.