This is a flight-critical spare part requiring Government source approval prior to award, with only previously approved sources solicited. New sources must submit all required technical data per the NAVSUP WSS Source Approval Brochure, or their offers will not be considered. If source approval cannot be processed in time, award may proceed based on fleet support needs. The item must meet qualification requirements at the time of award under FAR clause 52.209-1. The government is not using commercial acquisition procedures, though interested parties may identify commercial item capability.