This is a sole-source solicitation for a flight-critical part, requiring government source approval prior to contract award. The Government intends to negotiate with only one pre-approved source, but all responsible sources may submit a proposal or statement of capability. Proposals from other sources will be considered if received within 45 days of the synopsis publication. Unapproved sources must submit detailed source approval information with their proposal, and the time required for new source approval is typically too long to delay an award. The delivery terms are FOB Origin for a quantity of 33 units.