NTSB Identification: DEN85FA027.
The docket is stored on NTSB microfiche number 27829.
Accident occurred Thursday, November 15, 1984 in BINGHAM CANYON, UT
Aircraft: BELL 206B-11, registration: N1077T
Injuries: 4 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.PILOT WAS TAKING PASSEENGERS ON A SIGHTSEENG FLIGHT OVER THE KENNECOTT COPPER MINE, LARGEST OPEN PIT COPPER MINE IN THE WORLD. HELICOPTER COLLIDED WITH UNMARKED POWER LINES APPROX 185 FT AGL. POWER LINES ARE SUPPORTED BY TWO UNMARKED TOWERS ON OPPOSING HILLS 1983 FT APART.
Contributing Factors
OBJECT..WIRE,TRANSMISSION
Contributing Factors
TERRAIN CONDITION..MOUNTAINOUS/HILLY
Contributing Factors
JUDGMENT..POOR..PILOT IN COMMAND
Contributing Factors
VISUAL/AURAL DETECTION..PILOT IN COMMAND
Contributing Factors
LIGHT CONDITION..SUNGLARE
Contributing Factors
VISUAL LOOKOUT..INADEQUATE..PILOT IN COMMAND
Contributing Factors
LACK OF FAMILIARITY WITH GEOGRAPHIC AREA..PILOT IN COMMAND
Contributing Factors
WINDOW,FLIGHT COMPARTMENT WINDOW/WINDSHIELD..DIRTY(FOGGY)
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