NTSB Identification: MIA87LA155.
The docket is stored on NTSB microfiche number 33573.
Accident occurred Sunday, May 03, 1987 in PANAMA CITY BCH, FL
Probable Cause Approval Date: 07/05/1988
Aircraft: BELL 47G-3B1, registration: N43CD
Injuries: 3 Uninjured.

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

THE PLT REPORTED THAT SHORTLY AFTER TAKEOFF THE ENG BEGAN TO LOSE POWER, THEN FAILED. HE THEN AUTOROTATED & SET THE HELICOPTER DOWN APRX 6 FEET OFFSHORE. EXAMINATION OF THE ENG LOGBOOKS BY FAA PERSONNEL REVEALED THAT AD 62-23-02 WHICH REQUIRES INSP OF THE OIL FILTER EVERY 25 HOURS HAD BEEN OVERDUE BY 20.9 HOURS. INSP OF THE TRANSMISSION REVEALED THAT A 5 1/2 INCH PIECE FROM THE CLUTCH DRUM RING SEPARATED WHICH DISENGAGED THE MAIN ROTOR FROM THE ENG RESULTING IN THE LOSS OF MAIN ROTOR RPM. EXAMINATION OF THE FAILED CLUTCH DRUM RING REVEALED EVIDENCE TO SUGGEST THAT IT FAILED DUE TO FATIGUE.

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

ROTOR DRIVE SYSTEM,CLUTCH ASSEMBLY..FAILURE,TOTAL

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

ROTOR DRIVE SYSTEM,CLUTCH ASSEMBLY..FATIGUE



Contributing Factors

TERRAIN CONDITION..WATER,ROUGH

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