Qualla: 22 January 1971 Surgut Aeroflot Antonov An-12 Crash

22 January 1971 Surgut Aeroflot Antonov An-12 Crash: Introduction

Fri, 27 Mar 2026 00:00:00 GMT

The last words from CCCP-11000 were routine. At 19:36 Moscow time on January 22, 1971, the crew of the Aeroflot Antonov An-12B acknowledged a controller's instruction to begin their third turn in the landing circuit at Surgut International Airport. Then silence. Eighteen kilometers northeast of the runway, in darkness and freezing cloud, ice had been building on the aircraft's wings for the entire approach. The engine bleed air valves that should have fed hot air to the de-icing system were closed. No one in the cockpit knew it. At 330 kilometers per hour in a left bank, the airflow over the contaminated wings finally separated. The aircraft rolled past ninety degrees, dove into the frozen ground near the Pochekuika River, and burned.

22 January 1971 Surgut Aeroflot Antonov An-12 Crash: Fourteen Souls, Twelve Tons of Cargo

Fri, 27 Mar 2026 00:00:00 GMT

CCCP-11000 was not supposed to be flying to Surgut that day. The five-year-old An-12B, built at the Tashkent Aviation Plant in December 1965 and assigned to the Syktyvkar aviation department, had accumulated 5,626 flight hours and 2,578 landings. An order had come through to ferr...

22 January 1971 Surgut Aeroflot Antonov An-12 Crash: Into the Clouds at Surgut

Fri, 27 Mar 2026 00:00:00 GMT

The aircraft departed Omsk at 18:09 Moscow time and climbed to a cruise altitude of 6,600 meters. At Surgut, conditions were deteriorating. Solid cloud sat at 450 meters, visibility was 5.5 kilometers, a fresh northerly wind blew across the airfield, and temperatures had dropped ...

22 January 1971 Surgut Aeroflot Antonov An-12 Crash: The Same Airfield, Nine Days Later

Fri, 27 Mar 2026 00:00:00 GMT

What makes this crash extraordinary is not just the accident itself but what followed. On January 31, 1971, nine days after CCCP-11000 went down, another An-12, registration CCCP-12996, crashed at Surgut under nearly identical circumstances. That crew, too, was executing the thir...

22 January 1971 Surgut Aeroflot Antonov An-12 Crash: Lessons Written in Wreckage

Fri, 27 Mar 2026 00:00:00 GMT

The twin disasters at Surgut forced Soviet aviation authorities into action. Investigators determined that the An-12's bleed air control system lacked a critical feature: there was no cockpit indicator showing whether the valves were fully open or closed. Crews had no way of know...