NTSB Identification: MIA89IA186.
The docket is stored on NTSB microfiche number 40446.
Nonscheduled 14 CFR
Incident occurred Thursday, July 06, 1989 in CHIEFLAND, FL
Probable Cause Approval Date: 08/26/1992
Aircraft: BELL 206L-1, registration: N2137U
Injuries: 3 Uninjured.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

THE FLT WAS NEARING THE DESIGNATED PICK-UP AREA AT ABOUT 300 FT & WAS ON FINAL APRCH, WHEN A NOISE WAS HEARD FROM THE ENG SECTION. THE PILOT MADE AN AUTOROTATION INTO A FIELD. AN EXAM OF THE TURBINE SECTION REVEALED THAT IT WAS 'LOCKED UP.' DISASSEMBLY OF THE TURBINE MODULE REVEALED THAT A PIECE OF THE FIRST STAGE TURBINE WHEEL DISK HAD SEPARATED.

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

ENGINE FAILURE DUE TO FAILURE OF THE FIRST STAGE TURBINE WHEEL DISK.

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