This procurement is for 22 units of a flight-critical part that requires existing Government source approval prior to contract award. The Government intends to negotiate with only one pre-approved source, but all responsible sources may submit proposals or statements of capability. Proposals received within 45 days of the synopsis publication will be considered by the Government. Interested parties must also submit specific source approval information with their proposal unless they are already an approved source. The performance location, budget, and specific non-bid timelines are not detailed in this description.