Mexicana de Aviación
Mexicana Flight 940, operated by Mexicana Airlines (Compañía Mexicana de Aviación), was a scheduled international flight from Mexico City–Puerto Vallarta–Mazatlán–Los Angeles on March 31, 1986, utilizing a Boeing 727-200 registered as XA-MEM, when the plane crashed into El Carbón, a mountain in the rugged Sierra Madre Occidental mountain range northwest of Mexico City, killing everyone on board. With 167 deaths, the crash of Flight 940 is the deadliest aviation disaster ever to occur on Mexican soil, and the deadliest involving a Boeing 727.