Synopsis
A Thai-registered aircraft on a ferry flight from Thailand to the United States mainland experienced difficulties over the Pacific Ocean. After departing Honolulu, the pilot encountered a decrease in engine oil pressure and reversed course toward Hawaii. Over three hours, the pilot reported decreasing oil pressure, rising temperatures, and falling manifold pressure. Approximately 345 miles from Hawaii, the pilot informed a U.S. Coast Guard C-130 crew that an engine failure was imminent and that ditching was necessary.
Ditching
The Coast Guard crew advised the pilot on procedures for a water landing. The pilot executed an emergency descent and ditched the aircraft. During the ditching, the aircraft bounced off one swell, struck another, and nosed down. The aircraft remained afloat upright for about 45 minutes before sinking. The aircraft doors were not opened, and the pilot was not observed in the water after the ditching.
Aftermath
The Coast Guard C-130 remained over the area until the aircraft disappeared from view. Neither the pilot nor the aircraft were recovered. The government of Thailand delegated the investigation of the accident to the National Transportation Safety Board (NTSB).