This sources sought synopsis is for market research by the Defense Logistics Agency at Redstone Arsenal, Alabama, to identify potential manufacturing/supply sources for a TEST SET, AIRCRAFT E (NSN 4920-01-602-5597; Part Number 09-1009-02) supporting the ENGINES weapon system. The acquisition is currently being pursued under FAR 6.302-1(a)(1) as only one responsible source exists because the data needed for competitive acquisition is not physically available or economically obtainable, and adequate specifications cannot be drafted. The applicable NAICS code is 334419 with a size standard of 750 employees, and all business types—including 8(a), small business, small disadvantaged business, Service-Disabled Veteran-Owned, HUBZone, and Women-Owned small business concerns—are invited to identify themselves. Contractors must meet prequalification requirements to be registered as potential sources and are encouraged to seek source approval through AvMC’s public website. Interested firms must be capable of performing special requirements, recurring and nonrecurring engineering services to become qualified, and all manufacturing/production aspects including supply chain management, logistics, forecasting, long-lead procurement, obsolescence management, and final delivery; this announcement is informational/planning only and no funds are available for preparing responses.