LANSA Flight 501 was a domestic flight from Lima to Cusco operated by a Lockheed L-749 Constellation aircraft registration OB-R-771.

On 27 April 1966 Flight 501 crashed into a mountain side in Tomas District, killing all 49 on board.

[1] The plane radioed a distress call 10 minutes after takeoff.

At least four Americans, two Swiss, one Canadian, three Germans and one Spaniard were on board.

[2] Also on the plane were three members of the University of Cuzco, including its rector, Jorge Chávez Chaparro.