NTSB Identification: SEA87LA186.
The docket is stored on NTSB microfiche number 34997.
Accident occurred Friday, September 11, 1987 in QUINCY, WA
Probable Cause Approval Date: 04/24/1989
Aircraft: HILLER UH-12E, registration: N8QA
Injuries: 1 Serious.
NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.
DURING AN AERIAL APPLICATION MANEUVER THE PILOT FLEW INTO TWO 23,000 VOLT POWERLINES. THE HELICOPTER'S ROTOR BLADES STRUCK THE POWERLINES, THE AIRCRAFT TURNED TO THE RIGHT AND DESCENDED TO THE GROUND.
The National Transportation Safety Board determines the probable cause(s) of this accident to be:CLEARANCE..NOT MAINTAINED..PILOT IN COMMAND
The National Transportation Safety Board determines the probable cause(s) of this accident to be:IN-FLIGHT PLANNING/DECISION..IMPROPER..PILOT IN COMMAND
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