Accident Sequence
Following touchdown on the runway at Iwakuni Air Force Base, the aircraft lost directional control and veered to the right. It departed the paved surface and contacted soft ground, causing the undercarriage to be sheared off. The aircraft continued to slide for several yards before coming to rest. During the slide, the left wing was crumpled.
Aftermath
There were no casualties resulting from the accident. However, the aircraft sustained damage that rendered it beyond economical repair.
Investigation Findings
The official investigation determined the probable cause of the accident. After landing, the copilot inadvertently opened the right throttle and the left cowl flap instead of both cowl flaps. This action led to the loss of control and subsequent runway excursion.