North Bend, OR, USA
N151LC
BELL UH-1E
DRG A LOGGING OPN, THE PLT NOTED AN APPARENT TRANSMISSION MALFUNCTION. AN AUTOROTATIVE LANDING WAS MADE ON UNPREPARED TERRAIN & THE HELICOPTER WAS DAMAGED. AN INVESTIGATION REVEALED THE TAIL ROTOR DRIVE INPUT GEAR IN THE 42 DEG GEARBOX HAD FAILED FROM FATIGUE. N151LC WAS A MILITARY SURPLUS HELICOPTER. THE GEARBOX HAD BEEN OVERHAULED ON 6/15/87. THE OPERATOR'S RECORDS SHOWED IT HAD BEEN IN SERVICE FOR 373 HRS SINCE OVERHAUL.
Source: NTSB Aviation Accident Database
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