The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the repair and modification of circuit card assemblies, identified by NSN 7R-5998-015191437-V2, with a quantity of 26 units required. This procurement necessitates engineering source approval due to the flight-critical nature of the item, which mandates that only approved sources may submit proposals, as they possess the unique design capabilities and technical data essential for maintaining quality. Interested vendors must provide comprehensive documentation as outlined in the NAVSUP Source Approval Information Brochures, and proposals must be submitted within 45 days of this notice, with the primary contact for inquiries being Shannon K. Hart at (215) 697-3638 or via email at SHANNON.K.FITZGERALD3.CIV@US.NAVY.MIL.