The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for a commercial item identified as NSN 1R-1680-LLF02J254-P8, with a reference number of BAC27DCC3573, requiring a quantity of one unit. This procurement involves a flight-critical item that necessitates Government source approval prior to contract award, as the technical data available does not support full and open competition; thus, only previously approved sources will be solicited. Interested vendors must provide comprehensive documentation as outlined in the NAVSUP WSS Source Approval Information Brochures, and proposals must be submitted within 45 days of this notice, with the understanding that the Government may proceed with award based on Fleet support needs if source approval cannot be processed in time. For further inquiries, interested parties can contact Kelly A. Gipson at (215) 697-4787 or via email at KELLY.A.GIPSON1@NAVY.MIL.