1971 January 22 Surgut Aeroflot Antonov An-12 crash

This article is about crash on 22 January. For a very similar crash 9 days later (31 January), see 1971 January 31 Surgut Aeroflot Antonov An-12 crash.

1971 January 22 Surgut Aeroflot Antonov An-12 crash

230px An Aeroflot Antonov An-12, similar to the aircraft involved in the accident
Accident summary
Date	22 January 1971
Summary	Icing due to bleed air valves being closed
Site	Surgut, RSFSR, Soviet Union
Passengers	2
Crew	12
Fatalities	14 (all)
Survivors	0
Aircraft type	Antonov An-12B
Operator	Aeroflot, Komi Civil Aviation Directorate
Registration	CCCP-11000
Flight origin	Omsk Tsentralny Airport (OMS/UNOO)
Destination	Surgut International Airport (SGC/USRR)

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.