The Department of Defense, through the Department of the Navy's NAVSUP Weapon Systems Support, is seeking proposals for the repair and modification of a wideband receiver, specifically NSN 7R-5841-016503575-RQ. This procurement requires engineering source approval due to the flight-critical nature of the item, necessitating that only approved sources may submit proposals, as the technical data necessary for full and open competition is not available. Interested parties must provide detailed documentation regarding their qualifications and experience in producing similar items, with a submission deadline of 45 days from the notice publication date. For further inquiries, potential bidders can contact Bridget M. Murphy at (215) 697-5047 or via email at BRIDGET.M.MURPHY6.CIV@US.NAVY.MIL.