What happened
During the initial climb phase, shortly after departing from the runway, the aircraft reached an altitude of approximately 300 feet when the crew reported that the number one engine had exploded. Following this mechanical failure, air traffic control provided instructions for the flight to perform a circuit and return to the airfield.
As the flight progressed through the pattern, the captain determined that the aircraft lacked sufficient performance to reach the runway safely. Consequently, the decision was made to execute an emergency landing in a nearby paddy field. The aircraft performed a belly landing, sliding across the terrain for several dozen yards before catching fire.
Despite the intensity of the post-crash fire, all 57 occupants managed to exit the cabin successfully. The aircraft was subsequently consumed by flames and destroyed.
Findings
Investigations into the incident concluded that the primary factor was the explosion and failure of the number one engine during the early stages of flight.