The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the repair and modification of synthesizers, identified by NSN 7R-5895-011629391-GL, with a quantity of 129 units required. This procurement necessitates engineering source approval due to the flight-critical nature of the item, which mandates that only approved sources may be considered for the contract, ensuring the quality and reliability of the synthesizers. Interested parties must submit their proposals along with the necessary source approval documentation within 45 days of this notice, and any inquiries should be directed to Alyssa T. Thieu at (215) 697-0169 or via email at alyssa.thieu@navy.mil.