Sikorsky Aircraft Corp, a subsidiary of Lockheed Martin Corp, provides military and rotary-wing aircraft to the US armed forces, along with military services and commercial operators. The company’s military services include aircraft delivery, aircraft modifications, field services, group support equipment, logistics technologies, maintenance and support solutions, overhaul and repair, spares, and technical publications. Its field operations centre provides modifications and airframe crash damage repairs, component repairs, and depot field teams to support fixed-wing and rotary-wing aircraft. Field service representatives (FSRs) offer technical assistance and guidance to owners/operators of Sikorsky Aircraft products. The overhaul and repair (O&R) division consists of system services, repairing and overhauling dynamic systems, blades, avionics, and other components. The company’s military aircraft portfolio includes the Sikorsky CH-53K helicopter, Sikorsky HH-60W combat rescue helicopter, and Sikorsky MH-60R SEAHAWK helicopter.