This is a firm fixed-price contract for four aircraft component NSNs, with variable quantities over an eight-year base period and three option years. The Government intends to solicit a sole source to the OEM, Unison, with AAR Supply Chain as the exclusive distributor, but is inviting other interested parties, including surplus dealers, to express their capability. Interested non-OEM sources must notify the Contracting Officer prior to the synopsis closing date and provide specific technical data to establish product equality. All offerors must be registered in SAM to be eligible for award. The final award decision will be based on factors including price and past performance.