What happened
During an approach to Dhaka-Tejgaon Airport at approximately 4,000 feet, the flight crew identified technical difficulties involving the aircraft's right engine. In response to these issues, the crew initially deactivated the engine. Although a subsequent attempt to restart the engine was successful, rising turbine temperatures forced the pilot to shut the engine down a second time.
Following this second shutdown, the crew encountered difficulty feathering the propeller. The resulting excessive drag caused the aircraft to lose altitude rapidly. To avoid a more serious impact, the captain executed an emergency landing in an open field. During the touchdown, the undercarriage of the aircraft separated from the fuselage. While the aircraft sustained damage beyond repair, all seven occupants managed to exit the wreckage without any injuries.
Findings
Investigations into the incident identified that the right engine failed for reasons that remain undetermined. A significant contributing factor to the loss of altitude was the failure of the automatic propeller pitch control mechanism, which prevented the crew from reducing drag during the emergency.