The United States Air Force is conducting market research for potential sources to perform depot-level repair of three specific C-5 hydraulic valve parts under a prospective five-year, firm-fixed-price requirements contract. The work involves repairing a Cap Valve, a Linear Valve, and a Hydraulic Valve Assembly for the C-5 Galaxy aircraft. The notice clarifies that this is for market research only and does not guarantee a future solicitation or contract award. Respondents must provide documentation supporting their repair capabilities and are encouraged to form joint ventures or teaming arrangements. Questions should be directed to the provided government contacts.