The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking proposals for the repair and modification of aircraft engine starters, identified by NSN 7R-2995-013608223-LU. The procurement involves a quantity of 47 units, with specific requirements for repair turnaround time (RTAT) and throughput constraints, emphasizing the need for engineering source approval due to the flight-critical nature of the parts. Interested contractors must submit their proposals, including necessary source approval documentation, within 45 days of this presolicitation notice, and should direct inquiries to Kristen N. Florczak at (215) 697-3770 or via email at KRISTEN.FLORCZAK@NAVY.MIL.