Investigation Summary
The flight departed Kostroma at night for a short domestic hop to Ivanovo. Shortly after liftoff, the aircraft began an unplanned bank. The investigation suggested that the crew lost situational awareness and spatial orientation in the dark, possibly due to a malfunction in the flight instruments (gyros). The aircraft lost altitude during the turn and struck trees in a wooded area near the airport. The impact and subsequent fire destroyed the aircraft, resulting in the deaths of all 2 crew members and 8 passengers.
Final Conclusions
The investigation determined the cause to be spatial disorientation during a night takeoff in instrument meteorological conditions. A suspected failure of the gyroscopic systems likely provided the crew with erroneous attitude information, leading to an unrecognized steep bank and subsequent loss of control. The aircraft struck terrain before the crew could recover.
Video Analysis
No video analysis linked for this case file yet.
Airframe & Maintenance
Systems & Failure Modes
Gyroscopic Flight Instruments
A suspected failure of the aircraft's gyroscopic attitude indicators (such as the AGB-3K) likely provided the crew with erroneous bank information during the night climb.
Interesting Facts
- 01The accident occurred during the initial climb phase shortly after takeoff from Kostroma-Sokerkino Airport.
- 02The crash site was located in a forested area near the airport.
- 03All 10 occupants, including 8 passengers and 2 crew members, perished in the accident.