This is a sole-source procurement for one unit of an aircraft part requiring engineering source approval due to its flight-critical nature and inadequate technical data for full competition. Only previously approved sources are being solicited; new sources must submit detailed source approval information with their proposal, but approval time typically prevents delaying award. The government will consider capability statements from other responsible sources under FAR 6.302-1, though this notice is not a request for competitive proposals. Award will only be made if the offeror, product, or manufacturer meets all qualification requirements at the time of award. The procurement is not being conducted under commercial item policies, and certain trade agreements may apply.