NTSB Identification: DEN82DA088
14 CFR Part 133: Rotorcraft Ext. Load
Accident occurred Thursday, April 15, 1982 in THAYNE, WY
Probable Cause Approval Date: 04/15/1983
Aircraft: AEROSPATIALE SA315B, registration: N48089
Injuries: 1 Minor.

THE HELICOPTER WAS HOVERING TO PICK UP A SLING LOAD WHEN A LOUD BANG WAS HEARD AND THE AIRCRAFT BEGAN TO SPIN COUNTER CLOCKWISE. INVESTIGATION REVEALED THAT THE TAIL ROTOR DRIVE SHAFT HAD BROKEN. "EXAMINATION OF THE SHAFT BREAK DISCLOSED A SMALL FRACTURE REGION TYPICAL OF FATIGUE CRACKING."

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

ROTOR DRIVE SYSTEM,TAIL ROTOR DRIVE SHAFT..CRACKED

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