PEACH SPRINGS, AZ, USA
N3898Y
BELL BH 206-L111
AFTER THE ROTORCRAFT TOOK OFF TO A HOVER THE PILOT DID A PEDAL TURN FOR A DOWN CANYON DEPARTURE. AFTER THE HOVER TURN THE PILOT SLID TO THE RIGHT TO CLEAR SOME OBSTACLES AND WHEN THE ROTORCRAFT MOVED LATERALLY ABOUT 25 FEET THE PILOT HEARD A BANG. THE LEFT PEDAL WAS SLACKED AND THE ROTORCRAFT BEGAN TO SPIN TO THE RIGHT UNTIL IT CAME TO REST 10 DEGREES NOSE DOWN. THERE WERE NO INJURIES AND NO FIRE. INVESTIGATION REVEALED THAT THE TAIL ROTOR SHAFT ASSEMBLY FAILED BETWEEN NUMBER 3 AND 4 HANGER BEARINGS. THE NUTS THAT HOLD EACH ASSEMBLY TOGETHER WERE MISSING. THE BOLTS WERE NOT SHEARED. ONE WAS FOUND IN THE ROCKS BELOW THE TAIL ROTOR. THE OTHER WAS STILL IN PLACE. NO NUTS WERE FOUND AT THE CRASH SCENE. THE FACTORY RECOMMENDED BLUE DOTS WERE MISSING WHEN THE NEW NUTS WERE REPLACED BY MAINTENANCE PERSONNEL.
Source: NTSB Aviation Accident Database
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