The Air Force is seeking market research responses for a potential spares procurement of the F100 HOT SECTION MODULE, NSN 2840-01-582-2797 NZ, part numbers 4089013-800 and 4089013-801, to assess competition and possible small business set-aside. This is a Sources Sought notice only; no solicitation is available, no funds are available for the requested information, and no contract award will result from this market research. Performance location is Tinker AFB, OK 73145, and interested sources include large businesses and all small business categories under NAICS 336412 with a 1,500-employee size standard. Potential sources must be capable of new manufacture, including labor, materials, facilities, equipment, component procurement, inspection, testing, preservation/packaging, shipping, and may also manage supply chain, logistics, forecasting, long-lead parts, diminishing manufacturing sources, and nonrecurring engineering costs to become an approved source. The estimated spares requirement date is October 1, 2028, with unit prices established at contract award.