The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the repair and modification of engine regulators, specifically NSN 7R-2925-016434472-QE, with a quantity of 36 units required. This procurement is critical as the item is flight critical, necessitating Government source approval prior to contract award, and the technical data required for competitive solicitation is not available. Interested parties must submit their proposals along with the necessary documentation for source approval within 45 days of this notice, and any inquiries should be directed to Michael J. Zuccarini at (215) 697-1106 or via email at MICHAEL.ZUCCARINI@NAVY.MIL.