NTSB Identification: SEA85FA086.
The docket is stored on NTSB microfiche number 27749.
Accident occurred Sunday, April 07, 1985 in SUNNYSIDE, WA
Aircraft: PIPER PA-18-150, registration: N4379Z
Injuries: 1 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.

THE ACFT CRASHED AFTER COLLIDING WITH ELECTRICAL POWER LINES NEAR AN OPEN FIELD. INITIAL IMPACT WITH THE POWER LINES OCCURRED WHERE THE WIRES WERE ROUTED OVER A DRAW BETWEEN 2 RIDGES. THE ACFT CAME TO REST INVERTED BETWEEN THE POWER LINES & THE OPEN FIELD. THE ACFT WAS RELATIVELY INTACT WITH EXTENSIVE GROUND IMPACT DAMAGE TO THE LEFT WING & COMPRESSION & TWISTING TO THE REAR FUSELAGE. THERE WAS HEAVY SCRAPE MARKS ON THE LEFT MAIN GEAR. THE PROP SHOWED NO ROTATIONAL MARKS OR DAMAGE. THE LEFT FUEL CAP WAS OFF & SOME FUEL WAS REMAINING IN THE REAR CORNER. THE RIGHT FUEL CAP WAS IN PLACE. THE CARB HEAT CONTROL WAS WEDGED IN THE ON/HOT POSITION. THE CONNECTING WIRES TO THE STARTER SWITCH WERE FOUND CORRODED AT THE ATTACH SCREWS, THEY WERE PARTLY SEPARATED & THE CASE WAS BROKEN. NO PREIMPACT PART FAILURE OR MALFUNCTION WAS VERIFIED.

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

REASON FOR OCCURRENCE UNDETERMINED

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

VISUAL LOOKOUT..INADEQUATE..PILOT IN COMMAND


Contributing Factors

OBJECT..WIRE,TRANSMISSION

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