The 633rd Contracting Squadron at Langley Air Force Base is seeking feedback from capable companies for the replacement of an obsolete diesel engine to improve operational efficiency and readiness. This is a Request for Information for market analysis only, and no contract will be awarded from this notice. The performance location is Langley Air Force Base. The government is seeking industry input to determine the availability of qualified sources and to develop an acquisition strategy. Participation is voluntary and all response costs are borne by the interested party.