The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the repair and modification of power transformers, identified by NSN 7R-5950-006320763-EE and reference number 7637648P1, with a quantity of 2 each. The procurement is critical as the item is flight critical, and the government requires source approval prior to contract award, limiting solicitation to previously approved sources due to insufficient technical data for open competition. Interested parties must submit their proposals along with necessary source approval documentation within 45 days of this notice, and can contact Dina M. Wojciechowski at (215) 697-1219 or via email at DINA.M.WOJCIECHOWSKI.CIV@US.NAVY.MIL for further information.