What happened
Shortly after departing from Ashiya Air Base, the aircraft experienced a mechanical failure involving the right propeller. This malfunction led to a total loss of control over the aircraft. During the descent, five crew members successfully exited the plane via bailout. The aircraft subsequently impacted the ocean approximately 33 km north of the airfield.
Following the crash, a Japanese fishing vessel assisted in the recovery efforts, and four crew members were rescued from the water. However, the accident resulted in three fatalities, including both pilots and one additional occupant.
Findings
Investigations into the incident determined that the primary factor was the malfunction of the right propeller, which directly caused the loss of control during the flight.