What happened
A maritime patrol mission originating from Fukuoka Airport ended in a fatal collision with terrain. The aircraft, a twin engine plane registered JA8825 (MA825), was performing a flight over the waters near Nagasaki Prefecture when the accident occurred.
During the ascent phase following departure, the crew encountered challenging weather conditions characterized by low cloud cover and limited visibility. While attempting to climb, the aircraft made contact with the slope of Mt Tachizawa, situated south of Fukuoka. The impact with the mountain resulted in the total destruction of the airframe. There were five fatalities among the occupants, with no survivors reported from the crash site.
Findings
The primary factor contributing to the accident was poor visibility and low clouds during the climb phase, which led to the aircraft striking the mountain slope.