The flight carried out the Moscow-Irkutsk part of the route without incident. On 18 May at 03:02
Moscow time the flight departed from Irkutsk Airport, proceeding en route to Chita at an altitude of . At 03:22 flight 109 entered the zone of Chita air traffic control, and at 03:32 the air traffic controller permitted the flight to descend to . Shortly thereafter at 03:36 the flight radio transmitted an indication of danger three times; the crew then informed air traffic control that a passenger in the cabin insisted the flight change course. The controller confirmed receipt of the information. At 03:36:30 the crew reported they would maintain a holding pattern at ; at 03:36:45 the dispatcher asked the crew for their current altitude, to which they reported they would be increasing to . At 03:38 a coded transmission indicating the flight was in danger was sent, but was interrupted after the ninth dash. An onboard security officer, 21-year-old Vladimir Yezhikov, shot the hijacker twice. The bomb then detonated. The dispatcher informed the flight of their location relative to the airport, but the flight did not respond; the spot on the radar screen where the flight was appeared like a blur before it disappeared from the radar completely. At 4:55, the crew of a Mi-8 helicopter discovered the remains of the aircraft directly west of Chita Airport, stretching across land area over wide. None of the 81 people aboard the aircraft survived. == Conclusions ==