The cockpit crew consisted of:[3] Thunderclouds were present above the Chernihiv region sky for the duration of the flight.

Flight 1802 was flying at an altitude of 5700 meters with a speed of 350 km/h when at approximately 10:47 the rudder suddenly deviated 25° to the right, changing the roll angle and yaw.

The pilots responded quickly to this deflection by adjusting the ailerons in their attempts to reduce the roll.

A few seconds later the rudder deflected 9°, and the elevators deviated resulting in 30° to pitch (nose held up).

The airliner crashed 14.5 kilometers southeast of Chernigovskiy airport on a bearing of 245° at 10:48 with a rate of descent at nearly 100 m/s in uncontrolled flight.