What happened
During a mission to deliver aid following a typhoon, a four-engine aircraft was performing its descent toward Naga City Airport. The flight was operating under challenging meteorological conditions characterized by heavy rainfall and significantly reduced visibility.
As the aircraft progressed through its approach, it collided with the slope of Mt Manase, situated approximately 30 km from the destination airport. The force of the impact caused the airframe to disintegrate. There were 30 fatalities among the occupants of the aircraft, with no survivors reported from the crash site.
Findings
Investigations into the accident determined that the crew performed a controlled flight into terrain. This occurred because the flight continued its approach despite being below the established minimum safe altitude while operating in weather conditions that were below required visibility minima.