22 January 1971
| Icing due to bleed air valves being closed|
Surgut, RSFSR, Soviet Union
Soviet Union, Surgut, Russian Soviet Federative Socialist Republic
Aviogenex Flight 130, Alaska Airlines Flight 1866, 1971 Indian Ocean Vi, 1971 Colorado Aviation, Paninternational Flight 112
1971 January 22 Surgut Aeroflot Antonov An-12 crash Wikipedia
The 1971 January 22 Surgut Aeroflot Antonov An-12 crash occurred on 22 January 1971, when an Aeroflot Antonov An-12B, registered CCCP-11000, flying from Omsk Tsentralny Airport, in the Soviet Union's Russian Soviet Federated Socialist Republic (RSFSR), crashed 15 km (9.3 mi) short of the runway on approach to Surgut International Airport, Surgut, RSFSR. An investigation found the aircraft's ice protection system was ineffective because the engine bleed air valves were closed during the flight; ice therefore built up on the aircraft causing it to go out of control.