SEBEKA, MN, USA
N96117
BELL 206-B2
THE PILOT WAS ON AN APPROACH TO A FIELD SITE WHEN HE HEARD A LOUD 'BANG' FOLLOWED BY AN ENGINE OUT LIGHT AND AUDIO WARNING. THE PILOT EXECUTED A FORCED LANDING, WITH LOSS OF TAIL ROTOR CONTROL, WHICH RESULTED IN A HARD LANDING. TEARDOWN AND EXAMINATION OF THE ENGINE REVEALED THAT THE FIRST STAGE TURBINE WHEEL FRACTURED DUE TO THERMAL FATIGUE CRACKING.
POWER PLANT FAILURE DUE TO A FRACTURE OF THE FIRST STAGE TURBINE WHEEL, RESULTING IN AN UNCONTROLLED AUTOROTATION.
Source: NTSB Aviation Accident Database
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