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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