N2766U
BELL 206B-III
AS THE PILOT APPROACHED HELIDECK RIG 498 THE RIG WENT INTO THE AUTOMATIC SHUT-IN MODE. THIS PROCEDURE DEPRESSURIZES THE OIL RIG AND IS ACCOMPANIED BY LOUD BELLS AND VIBRATION AS THE SYSTEMS SHUT-IN. THE PILOT STATED THIS DISTRACTED HIM AND THE TAIL ROTOR COLLIDED WITH THE SAFETY FENCE DAMAGING THE TAIL ROTOR.
Source: NTSB Aviation Accident Database
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