LANSA Flight 502

1970 aviation accident in Peru

LANSA Flight 502 was a Lockheed L 188A Electra operated by Líneas Aéreas Nacionales Sociedad Anónima (LANSA) which crashed shortly after takeoff from Quispiquilla Airport near Cusco, Peru, on August 9, 1970, after losing all power from one of its four engines. The turboprop airliner, registered OB R 939, was bound from Cusco to Lima, carrying 8 crew and 92 passengers. All but one of the occupants died from injuries sustained from impact forces and post crash fire. Two people on the ground were also killed. There were 49 American high school exchange students on board, all of whom perished. A Peruvian government investigation concluded that the accident was caused by improper execution of engine out procedures by the flight crew and lack of proper maintenance. LANSA was fined and its operations were suspended for 90 days. At the time, the crash was the deadliest ever in Peruvian history before being surpassed by Faucett Perú Flight 251 in 1996.

At about 2:55 pm, the four engine Electra turboprop began its takeoff run to the west. At some point during the takeoff run or initial climb, the number three engine failed and caught fire. The crew continued the takeoff and climb, per standard procedure, using power from the remaining three engines. The pilot radioed the control tower declaring an emergency, and the control tower cleared the flight for an immediate landing. who was found in the wreckage of the cockpit badly burned but alive. Two farm workers were killed on the ground.

The crash was investigated by the Peruvian government, which published a Final Report on 3 September 1970. The report concluded that the accident was caused by failure of the number 3 engine immediately after takeoff, followed by failure of the flight crew to properly execute the appropriate engine out procedures, which led to the crash. There was also evidence of failure by LANSA to perform proper maintenance on the aircraft, which could have prevented the engine failure. The Peruvian government subsequently fined LANSA and some of its employees, and suspended the airline's operating license for 90 days as a consequence. Since LANSA began operations in 1963 until its demise in 1972, three of its flights ended in a fatal crash: LANSA 501, 502 and 508, with a total of 241 fatalities. About a year after the accident, a monument—a large white cross with an attached nameplate—was erected on the spot of the crash site to commemorate the victims of LANSA flight 502. In 2006, because of encroaching development, the Peruvian owner of the land where the memorial was originally located, under pressure from the U. S. Senator from New York, Charles E. Schumer, the U. S. Department of State and the U. S. Consulate General in Peru, agreed to relocate the memorial 45.72 m away to protect the site.