[2] At 10:38 MSK, the crew completed the initial pre-flight preparation, but due to worsening weather in Sovetsky, the flight was delayed.

At 12:20, the commander received an actual weather report for the destination airport: light northeasterly wind, continuous cloud cover at 180 meters, snow, mist, and visibility of 3 kilometers.

Prior to departure, only 2,900 kilograms of fuel were loaded into the aircraft's tanks, which excluded the possibility of diverting to an alternate airport (Perm or Nizhnevartovsk) if necessary.

The commander decided that the copilot would fly the aircraft during this phase, contrary to the training program for An-24 flight crews.

The controller indicated that the approach would be conducted using the ILS on a heading of 304°, but in violation of procedures, did not provide updated weather data, or the location and markings of the runway.

At 17:26:40, the commander reported entering the glide slope at 500 meters, 10 kilometers from the runway threshold, and began descending according to the approach pattern.

However, 6 km (3.7 mi) from Sovetsky at 250 m (820 ft), the vertical speed increased to 5 m/s, but the crew did not notice this as they were correcting a lateral deviation.

Realizing this, the pilots gradually reduced the vertical speed to zero and maintained level flight for about a kilometer until they rejoined the glide slope, then continued descending.

When the runway threshold was 300 meters away, the controller transmitted updated weather data, which was below the minimum required for an An-24, necessitating a go-around.