Final report published (in Russian)
The most likely cause of the crash of the An-2 RA-35171 was the failure of the PIC to take into account specific of the An-2 management at high flight speeds (an increase in the time required for the aircraft to leave the bank due to the decrease in the angles of the aileron deflection due to the pulling of the cable line due to a significant increase in forces in the transverse control channel at speeds of 270-300 km / h), which did not allow the aircraft to withdraw from the descent when maneuvering with large bank angles at an extremely low altitude.
The contributing factors were:
- flying the aircraft at modes beyond the limits set by the flight manual of the An-2 aircraft;
- Maneuvering at an altitude less than that established for performing a demonstration flight over the aerodrome.