What happened
On the morning of the accident, a twin-engine aircraft departed from Kostroma Airport at 08:09 local time, bound for Ivanovo. The flight was carrying a total of ten individuals, consisting of two pilots and eight passengers. During the climb phase, the aircraft was operating in marginal weather conditions.
While ascending, air traffic control instructed the crew to provide a report once they reached an altitude of 1,800 meters. However, no response was received from the cockpit. Shortly thereafter, the aircraft began an uncontrolled descent and impacted a forested area situated approximately 11 km north of the departure airport. The impact resulted in the total destruction of the airframe and 10 fatalities.
Findings
Investigators were unable to reach a definitive conclusion regarding the accident because the aircraft lacked both a Cockpit Voice Recorder and a Flight Data Recorder. Despite this lack of data, evidence suggests that the pilot-in-command experienced spatial disorientation following a malfunction of the horizontal gyro, which led to the loss of control.