NTSB Identification: LAX87FA318.
The docket is stored on NTSB microfiche number 37981.
Accident occurred Thursday, August 27, 1987 in COVELO, CA
Probable Cause Approval Date: 07/03/1989
Aircraft: BELL 206L-1, registration: N22HU
Injuries: 1 Uninjured.

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.

THE PILOT PERFORMED A VERTICAL TAKEOFF. AT APRX 30 FT AGL, WHILE TRANSITIONING TO FORWARD FLIGHT, THE ENGINE LOST POWER AND THE PILOT PARTIALLY LOWERED THE COLLECTIVE TO MAINTAIN ROTOR RPM. THE HELICOPTER LANDED HARD ON SLOPING TERRAIN AND BOUNCED LATERALLY TO THE RIGHT COLLIDING WITH TREES. DURING THE COURSE OF THE INVESTIGATION THE HELICOPTER WAS DEFUELED. APRX 14.6 GALS OF FUEL WERE DRAINED FROM THE REAR MAIN FUEL CELL AND APRX 4.7 GALS WERE DRAINED FROM THE RIGHT FRONT TANK. EXAMINATION OF THE FUEL SYSTEM REVEALED CONTAMINATION OF THE RIGHT AND LEFT IN-LINE FUEL FILTER ASSEMBLIES (PART NO. 206-063-001). THE CONTAMINATION WAS IDENTIFIED AS DIRT, PAINT CHIPS, LINT TYPE FUZZ, AND METAL SHAVINGS. ACCORDING TO BELL HELICOPTER THE FUEL TRANSFER SYSTEM CAN BE RENDERED INOPERATIVE BY CONTAMINANTS RESULTING IN ENGINE FLAMEOUTS.

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

FLUID,FUEL..STARVATION

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

FUEL SUPPLY..RESTRICTED


Contributing Factors

ROTOR RPM..INADEQUATE..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..HIGH OBSTRUCTION(S)


Contributing Factors

TERRAIN CONDITION..ROUGH/UNEVEN


Contributing Factors

TURBOSHAFT ENGINE..CONTAMINATION

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