LANSA Flight 502

LANSA Flight 502

A LANSA Lockheed L-188 Electra similar to the accident aircraft. A similar aircraft would later be involved in another accident
Accident
Date	August 9, 1970 (1970-08-09)
Summary	Pilot error due to mishandled engine failure caused by inadequate maintenance
Site	San Jerónimo, near Quispiquilla Airport, Cusco, Peru 13°32′16.36″S 71°57′57.73″W / 13.5378778°S 71.9660361°W / -13.5378778; -71.9660361 (approx.)
Total fatalities	101
Total injuries	1
Aircraft
Aircraft type	Lockheed L-188A Electra
Operator	Líneas Aéreas Nacionales S. A. (Peru)
Registration	OB-R-939
Flight origin	Quispiquilla Airport, Cusco, Peru
Destination	Jorge Chávez International Airport, Lima, Peru
Occupants	100
Passengers	92
Crew	8
Fatalities	99
Injuries	1
Survivors	1
Ground casualties
Ground fatalities	2

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.^[1] 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.^[2] 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.^[1][3]