What happened
During a scheduled patrol operation conducted over the Philippine islands, a seaplane impacted the slope of a mountain. The collision occurred during the flight phase while the aircraft was navigating the mountainous terrain. The impact resulted in the total destruction of the airframe.
There were no survivors of the accident. The incident claimed the lives of all 12 crew members on board the aircraft.
Findings
Official investigations into the crash concluded that the primary reason for the collision was a navigation error. This mistake led the aircraft into the terrain during its patrol mission.