“Four main versions are being worked out. This is a human factor in the performance of the flight, technical malfunction of the aircraft, it is possible to refuel the aircraft with low-quality fuel or weather conditions that led to the catastrophe, ”he said.
According to him, in the summer of 2017, the Su-27 underwent a complete modernization.
“From the time of this repair, he flew about 20 hours. And its resource on all technical state expertise was extended for 12 years. The plane is relatively new, ”he added.
He said that the prosecutor's office questioned almost all the witnesses.
On October 16, the Su-27 crashed in the Vinnitsa region, killing the head of aviation of the Vostok air command and the US military.
Read more - in the material RT.