NTSB Identification: LAX83LA213.
The docket is stored on NTSB microfiche number 21017.
Accident occurred Wednesday, May 04, 1983 in HEALDSBURG, CA
Aircraft: PIPER PA-25-235, registration: N4709Y
Injuries: 1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

BEFORE STARTING HIS DUSTING OPERATION, THE PLT HAD OBSERVED THE GRAPE VINEYARD & MADE PLANS TO BEGIN ON THE FOLLOWING DAY. HE REPORTED OBSERVING THE POWER LINES THAT WERE SUSPENDED ACROSS THE VINEYARD. HOWEVER, HE DID NOT NOTICE THE ANCHOR WIRE THAT WAS LOCATED BENEATH THE POWER LINES. THE WIRE EXTENDED APRX 600 FT FROM A TOWER ON A HILL TO A POLE IN THE VINEYARD. DURING A SWATH RUN UNDER THE POWER LINES, THE ACFT STRUCK THE ANCHOR WIRE, THEN CRASHED & BURNED. THE PLT BELIEVED THAT THE FIRE BEGAN WHEN SULFER DUST SPILLED ONTO THE ENGINE EXHAUST MANIFOLD.

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

PREFLIGHT PLANNING/PREPARATION..INADEQUATE..PILOT IN COMMAND

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,STATIC

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