Aviation Accident Summaries

Aviation Accident Summary SEA88LA143

North Bend, OR, USA

Aircraft #1

N151LC

BELL UH-1E

Analysis

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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