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NTSB Report
August 29, 1991 · Aerospatiale 350 B1 · N64SF
Walton, OR
Overview
Report Status
Probable Cause
Event Type
Accident
Date
August 29, 1991
Injury Outcomes
3 injuries (3 fatalities)
Location
Walton, OR
Aircraft
Aerospatiale 350 B1
Tail Number
N64SF
Operator
Bohemia
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
SEA91FA223
WHILE MANEUVERING IN REMOTE MOUNTAINOUS TERRAIN, ON A DARK NIGHT, WITH LIGHT DRIZZLE AND PATCHY CLOUDS, THE HELICOPTER COLLIDED WITH A MOUNTAIN. THE WRECKAGE SCATTERED ON A HEADING OPPOSITE THE FLIGHTS DESTINATION. THE HELICOPTER WAS DESTROYED BY A POST CRSH FIRE AND THERE WERE NO NOTED MECHANICAL FAILURES OR MALFUNCTIONS.
NTSB Probable Cause
THE PILOT'S FAILURE TO MAINTAIN CLEARANCE FROM TERRAIN.
Full Narrative
WHILE MANEUVERING IN REMOTE MOUNTAINOUS TERRAIN, ON A DARK NIGHT, WITH LIGHT DRIZZLE AND PATCHY CLOUDS, THE HELICOPTER COLLIDED WITH A MOUNTAIN. THE WRECKAGE SCATTERED ON A HEADING OPPOSITE THE FLIGHTS DESTINATION. THE HELICOPTER WAS DESTROYED BY A POST CRSH FIRE AND THERE WERE NO NOTED MECHANICAL FAILURES OR MALFUNCTIONS.
Flight
Event TypeAccident
Event Time23:59 PDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireGrd
Aircraft ExplosionGrd
Aircraft
AircraftAerospatiale 350 B1
Tail NumberN64SF
Aircraft CategoryHeli
DamageDestroyed
OperatorBohemia
Operating RulePart 135
Engines1
Engine TypeTurboshaft
Engine DetailsTurbomeca · ARRIEL 1 · Turboshaft · 684
Seats2
People & Injuries
Injury Summary3 injuries (3 fatalities)
Fatal3
Serious0
Minor0
Uninjured0
Total3
Crew 1Age 55 · Second Class
Conditions
ConditionsVMC
LightDark Night
WindCalm
Visibility12 sm
CeilingNone
Temperature / Dew Point0 C / 0 C
Altimeter0
Weather SourceWIT