HEALDSBURG, CA, USA
N4709Y
PIPER PA-25-235
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.
Source: NTSB Aviation Accident Database
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