This is a sole-source procurement for 15 units of a flight-critical part where only previously government-approved sources are being solicited. The technical data for competitive acquisition is unavailable, making new source approval a lengthy process that cannot delay the award. Unapproved sources must submit a comprehensive source approval request with their proposal, including detailed company experience and technical data. Proposals lacking the complete source approval documentation will not be considered. The delivery terms are FOB Origin.