This is a procurement for 6 units of a flight-critical part that requires Government source approval prior to contract award. The Government intends to solicit and negotiate with only one pre-approved source under FAR 6.302-1. While this is a notice of intent and not a formal competitive request, proposals from other sources will be considered if received within 45 days of the synopsis publication. Unapproved sources must submit a full source approval package with their proposal, and the approval process is typically too lengthy to delay an award. Interested parties can find required source approval brochures and technical documents through the provided NAVSUP WSS and DODSSP websites.