What happened
During a descent toward Calcutta-Dum Dum Airport, the aircraft encountered adverse weather conditions while traversing the border between India and Bangladesh. During this period of flight, the crew lost control of the plane. The aircraft subsequently struck an open field in the Khulna region, situated approximately 55 km southeast of its intended destination. The impact resulted in the total destruction of the airframe.
There were 44 fatalities among the occupants of the aircraft, with no survivors reported from the crash site.
Findings
Investigations into the accident determined that the primary factor leading to the loss of control was the presence of severe downdrafts and turbulence associated with thunderstorm activity encountered during the descent.