The Government intends a sole-source acquisition under FAR 6.302-1 for the specified flight-critical item, quantity 3 EA, delivery FOB origin. Engineering source approval by the design control activity is required because only approved sources retain the necessary data rights, manufacturing/repair knowledge, and technical data. Only previously approved sources have been solicited; new sources must qualify through the applicable NAVSUP WSS Source Approval Brochure and submit the required data with their offer. Offers lacking the required source-approval data or prior submission documentation will not be considered, and if new-source approval cannot be processed in time, award may proceed based on Fleet support needs. The Government is not using FAR Part 12 commercial-item policies, and drawings are not available.