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NTSB Report
July 22, 1991 · Bell 206B · N276KA
Toutle, WA
Overview
Report Status
Probable Cause
Event Type
Accident
Date
July 22, 1991
Injury Outcomes
4 injuries (1 fatality, 1 serious injury, 2 minor injuries), 1 uninjured
Location
Toutle, WA
Aircraft
Bell 206B
Tail Number
N276KA
Operator
Intermountain Air Service
Injuries
Fatal
Aircraft Damage
Substantial
NTSB Number
SEA91FA184
DURING A LOCAL SIGHT-SEEING FLIGHT, THE PILOT INITIATED A RIGHT DESCENDING TURN TO VIEW A HERD OF ELK NEAR A DRY RIVER BED. THE PASSENGERS STATED THAT THE FIRST TURN WAS NORMAL; HOWEVER, THE HELICOPTER CONTINUED TO TURN WHICH ACCELERATED WITH EACH ROTATION UNTIL THE HELICOPTER COLLIDED INTO THE DRY RIVER BED.
NTSB Probable Cause
FAILURE OF THE PILOT TO MAINTAIN AIRSPEED AND CORRECT FOR THE RIGHT YAWING CONDITION. FACTORS TO THE ACCIDENT WERE: INADEQUATE COMPENSATION FOR WIND CONDITIONS, DIVERTED ATTENTION, AND LACK OF TOTAL EXPEREINCE IN TYPE OF AIRCRAFT.
Full Narrative
DURING A LOCAL SIGHT-SEEING FLIGHT, THE PILOT INITIATED A RIGHT DESCENDING TURN TO VIEW A HERD OF ELK NEAR A DRY RIVER BED. THE PASSENGERS STATED THAT THE FIRST TURN WAS NORMAL; HOWEVER, THE HELICOPTER CONTINUED TO TURN WHICH ACCELERATED WITH EACH ROTATION UNTIL THE HELICOPTER COLLIDED INTO THE DRY RIVER BED.
Flight
Event TypeAccident
Event Time16:25 PDT
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftBell 206B
Tail NumberN276KA
Aircraft CategoryHeli
DamageSubstantial
OperatorIntermountain Air Service
Operating RulePart 91
Engines1
Engine TypeTurboshaft
Engine DetailsAllison · 250-C20 · Turboshaft · 317
Seats5
People & Injuries
Injury Summary4 injuries (1 fatality, 1 serious injury, 2 minor injuries), 1 uninjured
Fatal1
Serious1
Minor2
Uninjured1
Total5
Crew 1Age 64 · Second Class
Conditions
ConditionsVMC
LightDaylight
Wind180° @ 15 kt
Visibility30 sm
CeilingNone
Temperature / Dew Point0 C
Altimeter0
Weather SourceWIT