After the plane's captain decided to attempt a second attempt at landing, the Boeing reached an altitude of 1500 meters.
"Ascent continues automatically for 40 seconds," the source reportedly said. "For unknown reasons, the captain disengaged autopilot before the plane reached that height. Maybe the plane ran into ‘atmospheric scissors' (pilot slang), which could severely shake it. And the moment the autopilot was cut off, the Boeing dives to the ground."
According to the source, in the last six seconds before the crash, "inhuman screams" could be heard in the cabin.
On Saturday, the plane with 55 passengers and 7 crew members on board crashed while attempting to land at Rostov-on-Don in southern Russia, en route from Dubai. Nobody survived the crash, which occurred during conditions of poor visibility.