The Department of Defense, specifically the Department of the Navy through NAVSUP Weapon Systems Support, is seeking contractors for the repair and modification of heat exchangers, identified by NSN 7R-1660-014545010-QE. The procurement involves a quantity of four units, with delivery terms set to FOB Origin, indicating that the contractor will bear the shipping costs to the designated location. These heat exchangers are critical components used in aircraft air conditioning, heating, and pressurizing systems, underscoring their importance in maintaining operational readiness. Interested parties should reach out to Jessica P. Laychock at (215) 697-3992 or via email at JESSICA.LAYCHOCK@NAVY.MIL for further details regarding the presolicitation notice.