This is a procurement for 60 units of a flight-critical part that requires delivery FOB Origin. The part requires Government source approval prior to contract award, and only previously approved sources have been solicited. A prospective bidder that is not an approved source must submit a detailed source approval request together with their proposal. The time required to approve a new source normally precludes delaying an award, so awards may proceed based on Fleet support needs even if a new source's approval request is pending. The notice provides specific website links for the required Source Approval Information Brochures for spares and repair.