The requirement is for 55 EA of reference 10023-003, deliverable FOB Origin, and the part can only be procured from suppliers providing FAA-certified parts with an FAA Form 8130-3 Airworthy Approval Tag. Government inspection and acceptance will be conducted at source, and DLAD Product Verification Testing and DFARS Contractor Business Systems clauses are incorporated by reference; drawings are not available. Only government-approved sources are eligible, and distributors of approved sources must submit an authorized distributor letter on source letterhead to the buyer point of contact. Offers must be for newly manufactured spares only; refurbished, remanufactured, or repaired material is unacceptable. The part requires engineering source approval by the design control activity, and alternate sources must qualify under that activity’s Government-approved procedures.