Accident
On final approach to Tiksi, during night and poor weather conditions, the aircraft was at an altitude of 300 meters and a speed of 150 km/h when the engine failed. The airplane subsequently stalled and crashed into Tiksi Bay, approximately 2.5 km from the runway threshold.
Occupants
One passenger was rescued, while five other occupants were killed.
Probable Cause
The official investigation determined the probable cause to be an engine failure on approach to Tiksi Airport due to the failure of exhaust valves, pistons, and cylinders. It was also determined that the cylinder head temperature decreased on final approach and that the carburetor was iced, causing the engine to lose power and the aircraft to suffer a reduction of aerodynamic performances.