This opportunity is for the acquisition of a flight-critical aircraft part (quantity 4) that requires Government source approval prior to contract award due to limited technical data and unique engineering/manufacturing capabilities retained by approved sources. Only sources previously approved by the Government for this item have been solicited, and the Government intends to negotiate with a single source under FAR 6.302-1. New sources must submit the detailed technical and qualification information specified in the NAVSUP WSS Source Approval Information Brochures for evaluation; if not already under evaluation, approval may take longer than