Flight attendants initially told passengers there was nothing to worry about, but the plane was later replaced, resulting in a three-hour delay to the flight's destination of Ust-Kut, also in Irkutsk Oblast.
Some people reportedly started screaming, 'We are on fire! We are on fire!' at the sight of the smoke.
Smoke - Passengers - Rear - Aircraft - Antonov
The smoke was first noticed by passengers sitting at the rear of the aircraft - an Antonov An-24.