WHITE SULPHUR S, MT, USA
N5785V
AEROSPATIALE SA 315B
THE PILOT LANDED BESIDE A SMALL BUILDING (CALLED A DOG HOUSE) WHICH CONTAINED SEISMIC INSTRUMENTS AND RECORDING EQUIPMENT. HE WAS SCHEDULED TO MOVE THE BUILDING AND HOOKED A LONG LINE FROM IT TO THE HELICOPTER. AFTER WAITING ABOUT 45 MINUTES FOR FINAL INSTRUCTIONS, HE RECEIVED A CALL TO LOOK FOR A POWDER BAG THAT WAS LOST. THE PILOT FORGOT THAT THE LONG LINE WAS ATTACHED TO THE SMALL BUILDING AND TOOK OFF. AFTER REACHING THE END OF THE LONG LINE, THE HELICOPTER WAS JERKED TO THE GROUND AND CRASHED. A MEMBER OF THE SEISMIC CREW WAS IN THE BUILDING AND RECEIVED MINOR INJURIES.
Source: NTSB Aviation Accident Database
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