DLA Aviation is conducting market research via a sources sought notice to identify suppliers capable of manufacturing the source-controlled NSN 1560-00-890-8366, a DUCT, ENGINE BLEED item referenced under Lockheed Martin part number 4A92042-101B, with an estimated 5-year base period requirement. The applicable NAICS code is 336413, and there is no solicitation posted at this time. Approved sources include Arrowhead Products and Senior Operations, but other interested contractors would need to submit a Source Approval Request (SAR) because DLA does not possess complete technical data. Responses are voluntary, and the procurement may result in a small business set-aside or full and open competition, with possible multiple awards. Interested parties should submit tailored capability statements via email to the DLA contact listed in the notice.