NTSB Identification: SEA86LA204.
The docket is stored on NTSB microfiche number 32036.
Nonscheduled 14 CFR
Accident occurred Sunday, August 10, 1986 in GRANGEVILLE, ID
Aircraft: BELL 206L-1, registration: N1083Z
Injuries: 5 Minor.

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

THE HELICOPTER PLT WAS ON AN EMERGENCY MEDICAL SERVICE (EMS/MEDIVAC) FLT TO TRANSPORT SURVIVORS FROM AN AIRPLANE ACCIDENT. HE LANDED AT NIGHT ON A RIDGE ABOUT 1/4 MI FROM THE AIRPLANE CRASH SITE. AT ABOUT 2400 MDT, THE PLT ATTEMPTED TO TAKEOFF FROM THE REMOTE, CONFINED LANDING AREA WITH 2 EMERGENCY MEDICAL TECHNICIANS (EMT'S), A SHERIFF & A BURN VICTIM ABOARD. THE PLT STARTED A STRAIGHT AHEAD CLIMB OVER A RIDGE, BUT PAUSED, THEN DID A RUDDER TURN. AS HE STARTED TO TAKEOFF DOWNWIND IN LIGHT & VARIABLE WINDS, HE LOST VISUAL REFERENCE WITH THE GROUND. SUBSEQUENTLY, THE HELICOPTER BEGAN MOVING BACKWARDS & THE TAIL ROTOR CONTACTED A TREE. THE HELICOPTER THEN CRASHED ON DOWNSLOPING TERRAIN & LODGED AGAINST A TREE.

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

AIRCRAFT HANDLING..NOT MAINTAINED..PILOT IN COMMAND

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

SPATIAL DISORIENTATION..PILOT IN COMMAND


Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY


Contributing Factors

TERRAIN CONDITION..HIGH OBSTRUCTION(S)


Contributing Factors

LIGHT CONDITION..DARK NIGHT


Contributing Factors

VISUAL/AURAL PERCEPTION..PILOT IN COMMAND


Contributing Factors

OBJECT..TREE(S)

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