This is a market research notice seeking potential sources capable of qualifying and producing specific left-hand and right-hand center drive units for the C-5 aircraft's thrust reverser system. The government intends to issue a sole-source contract to Honeywell Industries, Inc., as competition is limited to entities meeting the proprietary technical data requirements owned by Honeywell. Interested parties may identify their interest and capability by emailing the listed contacts. This is not a request for proposal and does not constitute a formal solicitation. No budget, performance location, or specific procurement timelines are detailed in this notice.