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NTSB Report
March 11, 2012 · Hughes 369 D · C-GVEB
Trading Bay, AK
Overview
Report Status
Final with probable cause
Event Type
Accident
Date
March 11, 2012
Injury Outcomes
No injuries (4 uninjured)
Location
Trading Bay, AK
Aircraft
Hughes 369 D
Tail Number
C-GVEB
Operator
Prism Helicopters
Injuries
None
Aircraft Damage
Substantial
NTSB Number
ANC12CA025
The pilot was landing at an off-airport site in flat-light conditions. After touchdown, the left skid sank into the snow, and the helicopter began rolling to the left. The pilot attempted to correct the roll with right cyclic input but overcorrected, and the helicopter entered a dynamic roll to the right. The helicopter came to rest on its right side, sustaining substantial damage to the tailboom and the main rotor drive system. The pilot stated that there were no preaccident mechanical anomalies with the helicopter.
NTSB Probable Cause
The pilot's selection of an unsuitable landing site in flat-light conditions, which resulted in an inadvertent dynamic rollover.
Full Narrative
The pilot was landing at an off-airport site in flat-light conditions. After touchdown, the left skid sank into the snow, and the helicopter began rolling to the left. The pilot attempted to correct the roll with right cyclic input, but over corrected, and the helicopter entered a dynamic roll to the right, receiving substantial damage to the tail boom, and main rotor drive system. The pilot stated there were no preaccident mechanical anomalies with the helicopter.
Flight
Event TypeAccident
Event Time15:30 AKDT
Nearest Airport0nm
Runway36
Flight Plan FiledCvfr
Flight Plan ActivatedYes
Aircraft FireNo
Aircraft
AircraftHughes 369 D
Tail NumberC-GVEB
Aircraft CategoryHeli
DamageSubstantial
OperatorPrism Helicopters
Operating RulePart 135
Engines1
Engine TypeTurboshaft
Engine DetailsAllison · 250 · Turboshaft
People & Injuries
Injury SummaryNo injuries (4 uninjured)
Fatal0
Serious0
Minor0
Uninjured4
Total4
Crew 1Age 65 · Second Class · None
Conditions
ConditionsVMC
LightDaylight
WindCalm
Visibility5 sm
CeilingNone
Temperature / Dew Point18 C / 0 C
Altimeter29.94 inHg
Weather SourcePILO