NTSB Identification: ANC82FA036
Nonscheduled 14 CFR Part 135: Air Taxi & Commuter
Accident occurred Sunday, April 11, 1982 in NEAR TANANA, AK
Probable Cause Approval Date: 04/11/1983
Aircraft: HUGHES 369D, registration: N11058
Injuries: 3 Fatal.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

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.

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

VFR FLIGHT INTO IMC..CONTINUED..PILOT IN COMMAND


Contributing Factors

LIGHT CONDITION..DUSK


Contributing Factors

WEATHER CONDITION..LOW CEILING


Contributing Factors

WEATHER CONDITION..GUSTS


Contributing Factors

WEATHER CONDITION..SNOW


Contributing Factors

WEATHER CONDITION..WHITEOUT


Contributing Factors

TERRAIN CONDITION..MOUNTAINOUS/HILLY


Contributing Factors

TERRAIN CONDITION..RISING

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