NTSB Identification: MIA00LA134.
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Accident occurred Saturday, April 15, 2000 in LAKELAND, FL
Probable Cause Approval Date: 01/18/2001
Aircraft: Hiller UH-12C, registration: N301CH
Injuries: 1 Minor.

NTSB investigators may have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

The pilot was hovering to parking when the helicopter experienced a failure of the tail rotor drive shaft. The pilot attempted a hovering autorotation, hovering he did not apply collective pitch. The helicopter collided with the ground in a right skid low condition and rolled over on its right side. Examination of the tailrotor drive shaft revealed excessive wear on the splines to the upper U-joint and on the splines of the transmission output shaft.

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

The disconnection of the tail rotor drive shaft and subsequent lack of tail rotor control. Contributing factors were the worn drive shaft splines and the pilots' failure to apply collective on the touchdown resulting in a hard landing and subsequent roll over.

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