The Naval Air Systems Command (NAVAIR) intends to issue a Delivery Order to Sikorsky Aircraft Corporation for engineering, logistics support, and installation services to modify CH-53K aircraft. The work includes modifying one System Demonstration Test Article and incorporating AFC-646 on nine additional aircraft, with efforts covering aircraft modifications, non-recurring engineering, and installation support. The estimated period of performance is 12 months, from September 1, 2026, to August 31, 2027. Performance will occur at Sikorsky’s facility in Stratford, Connecticut. No budget amount is specified in the description.