NTSB Identification: LAX87FA332.
The docket is stored on NTSB microfiche number 37203.
Accident occurred Wednesday, September 09, 1987 in VALLEJO, CA
Probable Cause Approval Date: 05/26/1989
Aircraft: BELL 206B, registration: N1082S
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.
WHILE PERFORMING A ROUTINE AERIAL OBSERVATION FLIGHT TO INSPECT THE INTEGRITY OF THE PACIFIC GAS & ELECTRIC COMPANY'S TRANSMISSION LINES, THE HELICOPTER CRASHED AFTER COLLIDING WITH AN UNMARKED STATIC WIRE. THE LINE INSTALLATION WAS ON SLOPING TERRAIN & CONSISTED OF 3 TOWERS. THE SEVERED STATIC LINE WAS SUPPORTED BY TOWERS HAVING HIGHER ELEVATIONS. THE PLT FAILED TO DETECT & AVOID THE ELEVATED STATIC LINE. PG & E FAILED TO PROVIDE THE PLT WITH ADVANCE NOTICE OF THE HAZARDOUS & SOMEWHAT UNIQUE LINE CONFIGURATION.
The National Transportation Safety Board determines the probable cause(s) of this accident to be:VISUAL LOOKOUT..INADEQUATE..PILOT IN COMMAND
ALTITUDE..IMPROPER..PILOT IN COMMAND
INFORMATION INSUFFICIENT..COMPANY/OPERATOR MANAGEMENT
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