The U.S. Air Force is conducting sources-sought market research for a new spares buy of a T56 combustion liner (NSN 2840010491153OJ, P/N 6894068), with an estimated requirement of 63 units and no repair requirement. Potential sources must be capable of furnishing labor, materials, facilities, equipment, new manufacture, inspection, testing, preservation/packaging, and shipping, and may also handle supply-chain management, logistics planning, forecasting, long-lead procurement, and diminishing-source/material-shortage issues. Interested vendors must register as interested and complete a Source Approval Request package per the qualification requirements; technical data availability is governed by the Engineering Data List, and absent data may require independent acquisition. The Government encourages participation from all business types, including large and small businesses and socioeconomic categories, and may use this research to determine whether the effort is competitive or a small-business set-aside and whether to break it out by airframe. Performance is at Tinker AFB, OK 73145 USA, and estimated solicitation information is to be determined.