Long range airliner/freighter. In service since 1971. Tri jet development with the similar L-1001 TriStar. More powerful versions DC-10-30 and DC-10-40. Freighter version DC-10F, most common version today. KC-10 military tanker development. BOEING started a DC-10 modification program with MD-11 (two crew) cockpit. Production ceased 1989.