Accident Overview
The accident occurred during a night descent to Irkutsk-Intl Airport. The crew had been cleared to descend to 3,000 meters, then 2,100 meters, and finally to 1,800 meters. However, the crew failed to realize that their altitude was insufficient, and the aircraft struck trees and crashed on the top of a hill 700 meters high, located 21 km southeast of the airport. The aircraft was destroyed, and all four occupants were killed.
Probable Cause
The official investigation determined that the probable cause of the accident was the crew descending below the minimum descent altitude due to a wrong altimeter setting. Additionally, at the time of the accident, the crew was very tired due to a duty time exceeding 15 hours and 26 minutes.