The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the repair and modification of the Interface Unit, identified by NSN 7R-5865-016326467-V2. This procurement involves a quantity of 12 units, which require engineering source approval to ensure quality and compliance with design specifications, as the item is deemed flight critical. The government intends to negotiate with only approved sources due to the unique design capabilities and technical data rights associated with the part, and interested parties must submit their qualifications and source approval documentation within 45 days of this presolicitation notice. For further inquiries, Amanda M. Sweeney can be contacted at (215) 697-2198 or via email at AMANDA.M.SWEENEY4.CIV@US.NAVY.MIL.