The Government is procuring 58 units of NSN 7R-2925-016434472-QE, reference FV49900G1, with delivery FOB origin, and early or incremental deliveries are accepted. This flight-critical part requires engineering source approval by the design control activity, and only previously approved sources have been solicited because available technical data is not adequate for full and open competition. The intended contract action is sole-source under FAR 6.302-1, though responsible sources may identify their interest and capability or submit proposals. Non-approved sources must include the source approval information required by the applicable NAVSUP WSS brochure with their offer, or their offer may not be considered; award may proceed based on Fleet support needs if source approval cannot be processed in time. The Government is not using FAR Part 12 commercial-item policies, but interested parties may identify commercial-item capability to the contracting officer, and standardized documents are available through DODSSP/ASSIST.