Presolicitation notice from the Department of Defense, Department of the Navy, for the repair/modification of a centrifugal pump unit. The pump unit, classified under the Power and Hand Pumps industry, is identified by NSN 7R-4320-016665292-CB, with a quantity of 15 EA. The delivery is FOB Origin. Engineering source approval is required to maintain the quality of the part. Only approved sources have been solicited for this flight critical item. Interested parties must submit the necessary information for source approval. The proposed contract action is for supplies or services for which the Government intends to negotiate with only one source. All responsible sources may identify their interest and capability to respond to the requirement within 45 days.