NTSB Identification: MIA89LA165.
The docket is stored on NTSB microfiche number 39242.
Accident occurred Tuesday, May 30, 1989 in KEYSTONE HGTS., FL
Probable Cause Approval Date: 07/09/1990
Aircraft: BELL 47G-3B-1, registration: N53SP
Injuries: 1 Minor.

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 RPRTD THAT WHILE DEPG ON A SPRAYING OPN, THE HELICOPTER YAWED TO THE RGT & LEFT PEDAL APPLICATION WOULD NOT CORRECT THE YAW. HE THEN PERFORMED AN AUTOROTATIVE LANDING, SUBSEQUENTLY PULLING THE COLLECTIVE TO CUSHION IMPACT WITH TREES. A POST-ACDNT EXAM OF THE HELICOPTER REVEALED THE TAIL ROTOR DRIVE SHAFT HAD BECOME BENT BETWEEN THE #1 & #2 BEARINGS, ALLOWING THE FWD SHAFT TO PULL FROM THE COUPLING.

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

THE TAIL ROTOR DRIVE SYSTEM BECAME DISCONNECTED DUE TO A BENT TAIL ROTOR DRIVE SHAFT. THE TREES CONTRIBUTED TO THE HELICOPTER DAMAGE.

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