What happened
During a scheduled training mission originating from Novosibirsk-Severny Airport, an aircraft entered an uncontrollable descent. While maintaining cruising altitude, the flight crew performed a simulated failure of the left engine. During this maneuver, the application of maximum right rudder input led to an aerodynamic overbalancing. This action induced a side-slip condition from which the crew was unable to recover, as the rudder could not be returned to its neutral position.
Following the loss of control, the aircraft entered a steep dive and impacted the ground in a snow-covered, swampy forested region. The crash site was located approximately 91 km from Novosibirsk-Tolmachevo Airport, near the settlement of Penyok. There were six fatalities among the crew members on board.
Findings
- The accident occurred during an intentional engine failure simulation.
- The application of maximum right rudder caused an aerodynamic overbalance and a subsequent side-slip.
- A mechanical or aerodynamic inability to neutralize the rudder prevented the crew from regaining stable flight.