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, COHE, with a requirement for seven units (NSN 7R-5895-016184918-ZR). This procurement necessitates engineering source approval to ensure the quality of the parts, as they are flight critical and require unique design capabilities and manufacturing knowledge from approved sources. Interested vendors must submit detailed proposals, including any necessary source approval documentation, within 45 days of this notice, as the government intends to negotiate with only one source under FAR 6.302-1. For further inquiries, Alyssa T. Thieu can be contacted at (215) 697-0169 or via email at ALYSSA.THIEU@NAVY.MIL.