The Department of Defense, through the Defense Logistics Agency (DLA) Aviation at Huntsville, AL, is soliciting a Firm Fixed Price contract for the procurement of 20 units of CYLINDER ASSEMBLY, A (NSN: 1650-01-123-2704; Part Number: 173HS510-1) specifically for CH-47 CHINOOK aircraft, with delivery to Tinker Air Force Base. This acquisition is limited to three prequalified suppliers: The Boeing Company, Eaton Aerospace LLC, and Jamaica Bearings Co Inc, due to data rights and reverse engineering constraints, and interested firms are encouraged to seek source approval via the Army Aviation and Missile Command's website. The contract is critical for maintaining the operational readiness of the CH-47 fleet, and all responsible sources may submit offers, with foreign firms required to process requests through their respective embassies. For further inquiries, interested parties should contact Jonathan Gunnels at jonathan.gunnels@dla.mil or Jennifer N. Baker at jennifer.baker@dla.mil for solicitation requests.