The Department of Defense, through the Defense Logistics Agency (DLA) Aviation at Philadelphia, PA, is seeking qualified sources for the procurement of two Turret Drive Units, identified by NSN 7R-1680-016935163-P8 and reference number 284A5021-26. This procurement requires engineering source approval from the design control activity to ensure the quality and reliability of the flight-critical component, as only previously approved sources will be solicited. Interested vendors must provide comprehensive documentation demonstrating their capability to manufacture or repair the item, as well as any prior submissions for source approval, to be considered for the contract. For further inquiries, potential bidders can contact Daniel J. MacDonald at (215) 737-3766 or via email at DANIEL.MACDONALD@DLA.MIL.