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Probable cause released for helicopter crash at Pearl Harbor two - Honolulu, Hawaii news, sports & weather - KITV Channel 4

Probable cause released for helicopter crash at Pearl Harbor two years ago

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PEARL HARBOR, Hawaii -

The National Transportation Safety Board determined the in flight failure of a helicopter in February 2016 was due to improper maintenance. Their report goes on to say that the helicopter's drive shaft between the engine and transmission might not have been properly greased causing low RPM of the rotor. The crash happened after a tour pilot noticed a vibration throughout the cabin with four passengers on board. The pilot and three of the passengers survived the crash, while one passenger who died was trapped inside.