NTSB Identification: LAX94IA145.
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Nonscheduled 14 CFR
Incident occurred Monday, February 28, 1994 in HUELO, HI
Probable Cause Approval Date: 12/07/1994
Aircraft: AEROSPATIALE AS-350D, registration: N5771L
Injuries: 5 Uninjured.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

THE HELICOPTER EXPERIENCED AN ENGINE DECELERATION DURING A LOCAL SIGHTSEEING FLIGHT. THE PILOT ENTERED AN AUTOROTATION AND LANDED IN A CONFINED AREA SURROUNDED BY VEGETATION. A TREE STUMP PENETRATED THE LEFT LOWER SECTION OF THE HELICOPTER. THE WRECKAGE EXAMINATION AND POSTACCIDENT ENGINE RUN-UP REVEALED THE ENGINE WOULD NOT ACCELERATE MORE THAN 58 PERCENT AND THAT THE FUEL CONTROL UNIT LINE WAS LOOSE AND WAS LEAKING FUEL. THE OPERATOR REPLACED THE FUEL CONTROL UNIT 2 DAYS BEFORE THE ACCIDENT.

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

THE OPERATOR MAINTENANCE PERSONNEL'S INADEQUATE 100-HOUR INSPECTION. THE LOOSE FUEL CONTROL LINE FITTING, THE TREE STUMP, AND THE UNSUITABLE TERRAIN WERE FACTORS IN THIS ACCIDENT.

Full narrative available

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