The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking to procure two units of a flight-critical item identified by NSN 7R-1680-016425521-RQ, under a presolicitation notice. The procurement will be negotiated with only one source due to the necessity of engineering source approval to maintain the quality of the part, which requires unique design capabilities and manufacturing knowledge. This item is essential for maintaining operational readiness, and interested parties must submit their interest and capability to respond to the requirement, with proposals due within 45 days of the notice publication. For further inquiries, interested vendors can contact Carmelena C. Oldroyd at (215) 697-2606 or via email at Carmelena.Oldroyd@navy.mil.