This opportunity is for the acquisition of a single unit of a flight-critical part (NSN 7R-1615-013470734-VH) that requires Government source approval prior to award. Only previously approved sources are being solicited, as the technical data is not adequate for full competition and the part requires unique engineering and manufacturing knowledge. If you are not an approved source, you must submit a complete source approval request with your proposal, as failure to do so will result in disqualification. The delivery term is FOB Origin, and the performance location is not specified. No budget amount is provided, but proposals from non-approved sources will be considered if received within 45 days of this notice.