2018 Utair Mil Mi-8 crash

Investigation

An accident investigation report was released by the Interstate Aviation Committee (MAK). In the report, MAK said the accident occurred due to a combination of the following factors:

insufficient assessment of the level of risks associated with the possibility of aircraft collision in the air at the high intensity of air traffic at Vankor, its actual equipment and the order of air traffic organization on the part of both the airline and the aviation authorities and FSUE "State Corporation for Air Traffic Control";

the absence of the Igarka Control Center Dispatcher's Work Technology, which defines the procedure for performing the duties of the PIO Dispatcher with respect to aircraft flying from Vankor, and, as a result, the dispatcher's failure to understand and fulfill their duties to timely transmit to the aircraft crews the information about the collision danger;

malfunctioning of SPU-7 on Mi-8AMT RA-22427 helicopter, which in the circumstances of the emergency flight practically ruled out radio diligence of its crew;

unsatisfactory radio surveillance by the crew of Mi-8AMT RA-25640;

insufficient intelligibility and quality of VHF radio communication between the aircraft at Vankor station and the Igarka Control Center dispatcher, provided through a satellite repeater;

passivity of the Igarka Control Center dispatcher when there are doubts about the correctness of the information received via radio communication;

unsatisfactory situational awareness of the crews of both aircraft before and during takeoffs;

actual mutual positioning of the aircraft (flight trajectories), which practically ruled out effective visual flight awareness.