NTSB Identification: FTW86LA041.
The docket is stored on NTSB microfiche number 31431.
Nonscheduled 14 CFR
Accident occurred Friday, March 07, 1986 in NEW BOSTON, TX
Aircraft: HUGHES 369D, registration: N58420
Injuries: 1 Minor,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 PILOT EXPERIENCED A TAIL ROTOR DRIVE SHAFT FLEXIBLE COUPLING FAILURE WHEN HE PULLED COLLECTIVE PITCH TO COME TO A HOVER BEFORE LANDING. THE HELICOPTER ENTERED AN UNCONTROLLABLE RIGHT SPIN. DURING HIS HASTE TO GET THE HELICOPTER ON THE GROUND THE PILOT MADE A HARD TOUCHDOWN. THE SPINNING HELICOPTER THEN ROLLED ONTO ITS RIGHT SIDE BEFORE COMING TO A STOP.

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

ROTOR DRIVE SYSTEM,TAIL ROTOR DRIVE SHAFT..FAILURE,TOTAL

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