In fact, the fire had started during the climb, and soon the flames began to destroy the wires, as a result of which at 12:43-12:44 the range channel of the radio technical landing system (RTSM) stopped working.

The only deviations were a sharp increase in air pressure differential in the ventilation line and several false commands: "EXCESSIVE BANK," "ENGINE NO.

At 12:48:57, the pilots contacted the air traffic controller, reported the fire on board, and requested permission for an emergency descent and landing in Sverdlovsk (Koltsovo Airport).

Due to the cloud cover, the aircraft's marker on the radar screen was unstable, so the air traffic controller only provided bearings.

Eleven seconds later, at 12:55:20, due to the simultaneous shutdown of two PT-1000C consumers (powered by 36V) and the PT-200C converter, the attitude indicators PP-75 of both pilots and the course system KS-8 "froze."

The crew then transitioned to visual flight and selected a suitable landing area approximately 1,000 metres (3,300 ft) long.

[1] At 12:56:40 (14:56:40), 49 kilometres (30 mi) west (azimuth 285°) of Koltsovo Airport, flight 6246, flying on a course of 150° with the landing gear extended and flaps retracted, touched down on a snow-covered field.

After flying another 180 metres (590 ft), the airliner touched down for the third time and immediately collided with a stationary irrigation system, which caused the right wing with the right landing gear nacelle to detach.

Sliding "on its back" for several hundred more meters and losing the tail fin and both stabilizers, flight SU-6246 crashed into trees in a forest belt and broke up.

A total of 27 people died in the crash—4 crew members (the captain, co-pilot, navigator, and flight attendant Motareva) and 23 passengers.