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NTSB Report
April 11, 1982 · Hughes 369D · N11058
Near Tanana, AK
Overview
Report Status
Preliminary report
Event Type
Accident
Date
April 11, 1982
Injury Outcomes
3 injuries (3 fatalities)
Location
Near Tanana, AK
Aircraft
Hughes 369D
Tail Number
N11058
Operator
Tundra Copters
Injuries
Fatal
Aircraft Damage
Destroyed
NTSB Number
ANC82FA036
THE AIRCRAFT CRASHED ON A SNOW COVERED MOUNTAIN SLOPE WHILE IN A STEEP LEFT BANK/NOSE LOW TURN. THE 1754 AST WEATHER AT TANANA, AK (19 NM SSE) WAS, IN PART: 1800 FT BROKEN, 3500 FT OVERCAST, VISIBILITY 7 MI WITH LIGHT SNOW, WIND 320 DEG AT 18 KTS. FLIGHT ADVISORIES WERE POSTED FOR SOME TURBULENCE IN THE AREA, AND THERE WERE STRONG PRESSURE GRADIENTS WHICH WERE CAPABLE OF PRODUCING GUSTY LOW LEVEL WINDS. SNOW AND SNOW SHOWERS PERSISTED IN THE AREA WELL BEYOND THE ESTIMATED TIME OF THE CRASH. THE ELEVATION OF THE AIRPORT AT TANANA WAS 227 FT MSL, THE CRASH SITE WAS AT ABOUT 2550 FT MSL. DURING AN EXAMINATION OF THE WRECKAGE, NO PREIMPACT FAILURES WERE FOUND.
Full Narrative
THE AIRCRAFT CRASHED ON A SNOW COVERED MOUNTAIN SLOPE WHILE IN A STEEP LEFT BANK/NOSE LOW TURN. THE 1754 AST WEATHER AT TANANA, AK (19 NM SSE) WAS, IN PART: 1800 FT BROKEN, 3500 FT OVERCAST, VISIBILITY 7 MI WITH LIGHT SNOW, WIND 320 DEG AT 18 KTS. FLIGHT ADVISORIES WERE POSTED FOR SOME TURBULENCE IN THE AREA, AND THERE WERE STRONG PRESSURE GRADIENTS WHICH WERE CAPABLE OF PRODUCING GUSTY LOW LEVEL WINDS. SNOW AND SNOW SHOWERS PERSISTED IN THE AREA WELL BEYOND THE ESTIMATED TIME OF THE CRASH. THE ELEVATION OF THE AIRPORT AT TANANA WAS 227 FT MSL, THE CRASH SITE WAS AT ABOUT 2550 FT MSL. DURING AN EXAMINATION OF THE WRECKAGE, NO PREIMPACT FAILURES WERE FOUND.
Flight
Event TypeAccident
Event Time11:35 AHST
Nearest Airport0nm N
Runway0
Runway Length0
Runway Width0
Flight Plan FiledVFR
Aircraft FireNo
Aircraft ExplosionNo
Aircraft
AircraftHughes 369D
Tail NumberN11058
Aircraft CategoryHeli
DamageDestroyed
OperatorTundra Copters
Operating RulePart 135
Engines1
Engine TypeTurboshaft
Engine DetailsAllison · 250-C20B · Turboshaft · 420
Seats5
People & Injuries
Injury Summary3 injuries (3 fatalities)
Fatal3
Serious0
Minor0
Uninjured0
Total3
Crew 1Age 32 · First Class
Conditions
ConditionsVMC
LightDusk
WindCalm
CeilingNone
Temperature / Dew Point64 F / 0 C
Altimeter29.00 inHg
Observation Time17:54