Preliminary Accident Reports

February 2000 Issue

Nov. 2, Stites, Idaho / Hiller UH-12

At approximately 11:18 PST, a Hiller UH-12E suffered an inflight separation of a control rotor, after which the helicopter struck power lines and crashed. The pilot and one passenger were seriously injured; a third occupant was not injured. The pilot said he was on a fish-spotting mission at about 400 feet when the helicopter began vibrating. He raised the collective and tried to increase RPM, but the control rotor then departed the aircraft and the vibration became so severe that he thought the engine would vibrate off of its mounts. The pilot reported that he was about 75 feet agl when he saw the power lines, but did not feel he had sufficient control authority to evade them. He maintained...

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