NTSB Identification: CHI93FA249.
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Accident occurred Saturday, July 10, 1993 in WEST PLAINS, MO
Probable Cause Approval Date: 08/17/1994
Aircraft: AMERICAN EUROCOPTER AS350BA, registration: N350BA
Injuries: 2 Serious.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

WITNESSES STATED EVERYTHING SEEMED NORMAL AS THE HELICOPTER CIRCLED OVERHEAD BEFORE BEGINNING THE APPROACH TO LAND IN AN OPEN FIELD AT THE FAIRGROUND. THEY REPORTED THE HELICOPTER DESCENDED TO ABOUT 10 FEET ABOVE THE GROUND, THEN TURNED RIGHT AND STOPPED. THE HELICOPTER DROPPED, TAIL LOW, TO THE GROUND, THEN BOUNCED FORWARD HARD ON THE NOSE SECTION. WITNESSES STATED WHEN THE HELICOPTER BECAME AIRBORNE AGAIN IT WAS SPINNING, AND MOVING TOWARDS THEM. THE HELICOPTER STRUCK ELECTRICAL POWER LINES AND CAME TO REST ON AN ASPHALT ROAD ABOUT 90 FEET FROM THE POINT OF INITIAL IMPACT. POSTACCIDENT INVESTIGATION REVEALED NO EVIDENCE OF PREIMPACT MECHANICAL ANOMALY.

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

UNDETERMINED.

Full narrative available

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