NTSB Identification: DEN89FA019.
The docket is stored on NTSB microfiche number 37928.
Accident occurred Wednesday, October 19, 1988 in DECKERS, CO
Probable Cause Approval Date: 01/08/1990
Aircraft: BELL 206L-3, registration: N99TV
Injuries: 2 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.

WHILE ON A CORPORATE FLT THRU A CANYON IN MARGINAL WX CONDS, THE HELICOPTER COLLIDED WITH THE STATIC PORTION OF A POWER TRANSMISSION LINE & CRASHED. THE ACDNT OCCURRED WHERE A 2,554 FT SPAN OF THE POWER LINE CROSSED THE SOUTH PLATTE RIVER. THE POWER LINE (WITH LESS THAN 150 FT MEAN HEIGHT ABOVE THE TERRAIN) WAS NOT MARKED, NOR WAS IT REQUIRED TO BE MARKED, ALTHOUGH SPHERICAL MARKERS HAD ALREADY BEEN SCHEDULED FOR INSTLN ON THIS SPAN. ACCORDING TO LOCAL MEDIA PLTS, THE PLT OF N99TV WAS FAMILIAR WITH THE AREA & WAS AWARE OF THE POWER LINE. THE NEAREST WITNESS (ABT 1-1/2 MI FROM THE CRASH SITE) SAW THE HELICOPTER PASS OVERHEAD BEFORE IT CRASHED. ACCORDING TO THIS WITNESS, THERE WAS REDUCED VISIBILITY IN THE AREA WITH LIGHT RAIN. HIKERS IN THE AREA RPRTD RAIN, HAIL, HIGH WINDS & REDUCED VISIBILITY WITH MTN TOPS OBSCURED.

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

IN-FLIGHT PLANNING/DECISION..IMPROPER..PILOT IN COMMAND

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

VISUAL LOOKOUT..INADEQUATE..PILOT IN COMMAND

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

FLIGHT INTO KNOWN ADVERSE WEATHER..CONTINUED..PILOT IN COMMAND


Contributing Factors

OBJECT..WIRE,TRANSMISSION


Contributing Factors

WEATHER CONDITION..LOW CEILING


Contributing Factors

WEATHER CONDITION..FOG


Contributing Factors

VISUAL/AURAL PERCEPTION..PILOT IN COMMAND


Contributing Factors

WEATHER CONDITION..RAIN

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