This is a solicitation for 41 units of a commercial, off-the-shelf, flight-critical part. The government requires source approval prior to contract award, and only previously approved sources have been solicited. Unapproved sources must submit a detailed source approval request with their proposal, as the approval process is lengthy and an award cannot be delayed for it. Proposals that do not include all required source approval data will not be considered. The delivery terms are FOB Origin.