Here's the history:
The Lockheed TriStar's origin lies in a 1966 American Airlines specification for a short to medium-range, large-capacity transport. Lockheed and Douglas both designed an aircraft to meet the specifications. The result was two very similar aircraft. American decided to buy the DC-10. Lockheed received launch orders from TWA (33 orders/11 options) and Eastern (25 orders/25 options) on March 29, 1968 and production of the first L-1011 was started.
The engine of choice was the Rolls-Royce RB.211. The design, development and production costs for this new engine led Rolls-Royce to declare bankruptcy in Februay, 1971. Rolls-Royce's bankruptcy was a tremendous setback for the L-1011 program and one that it never recovered from.
Despite Rolls-Royce's financial problems, development of the TriStar continued and on November 17, 1970, Ship One (193A-1001) made the first flight with production RB.211-22 engines producing 42,000 pounds of thrust.
The L-1011-1 received FAA certification on April 14, 1972 and on April 26 the first revenue flight of the TriStar was made by Eastern Airlines. TWA followed Eastern and made their first TriStar flight on June 25, 1972 (LAX-STL-LAX).
The longer-range L-1011-200 was certificated on April 26, 1977 and was first flown by Saudia. The -200 is powered by the RB.211-524.
The L-1011-250, a conversion of -1 aircraft, that includes the RB.211-524B (50,000 lbs thrust) and greater fuel capacity entered service with Delta Air Lines in 1986.
The initial version of the inter-continental L-1011-500 entered service with British Airways on May 7, 1979. Pan Am introduced the extended wing and Active Control Surface L-1011-500 the following year.
Demand for the L-1011 did not meet market projections and Lockheed halted production of the TriStar in 1984. A total of 250 airplanes were built.
"For Us, Sky is not the limit.. Its Ground" / L-1011Alpha.