The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is soliciting quotes for the repair and modification of rotary engine drums, classified under NAICS code 336413. The procurement aims to ensure the availability of critical components for aircraft launching systems, which are essential for safe and effective military operations. This solicitation emphasizes the need for engineering source approval, as the components are classified as Flight Critical, and only approved manufacturers will be eligible for award. Interested contractors must submit their proposals, including firm-fixed price or time and materials pricing, by May 27, 2025, and can direct inquiries to Brian T. Kent at 215-697-0000 or via email at BRIAN.T.KENT.CIV@US.NAVY.MIL.