Accident Sequence
After taking off from Tompo en route to Topolinoye, the aircraft's engine emitted a thick white smoke and subsequently failed. The crew initiated an emergency landing. During the landing attempt, the left main gear collided with rocks on the bank of the Tompo River. The aircraft then went out of control, cartwheeled, and crashed.
Occupants and Injuries
All five occupants were rescued from the wreckage. Two of them sustained injuries, including the copilot. No fatalities were reported.
Investigation Findings
The investigation determined that the exact cause of the engine failure could not be established with certainty. However, investigators believe that the carburetor became frosted after the crew failed to activate the engine anti-ice system. Analyses of the engine revealed marks on the forward part of the compressor blades, indicating the presence of ice splinters consistent with icing conditions.