Because what goes up must come down, Keystone Helicopter provides maintenance and engineering support for rotorcraft and turbine engines. Its services span airframe maintenance, avionics integration, component repair, engine maintenance and overhaul, fabrication and machining. The company is a subsidiary of Sikorsky Global Helicopters, a segment of helicopter OEM, Sikorsky Aircraft (owned by United Technologies). The segment builds commercial, military, and paramilitary S-76s, S-92s, and light helicopters for its parent, as well as AgustaWestland, American Eurocopter, and Bell Helicopter Textron. Keystone Helicopter operates one facility in Pennsylvania; it was founded by former Navy pilot Peter Wright in 1953.