ESTILL, SC, USA
N4698
GRUMMAN G-164A
DURING A SWATH RUN, THE ACFT BEGAN TO LOSE POWER, SO THE PLT ABORTED THE MISSION & STARTED BACK TO THE ARPT TO LAND. HOWEVER, BEFORE REACHING THE ARPT, THE ENG QUIT RUNNING & THE PLT LANDED IN A FIELD. DURING THE LANDING, THE ACFT WAS EXTENSIVELY DAMAGED. AN INVESTIGATION REVEALED THAT THE OIL RING ON THE # 3 PISTON WAS BROKEN, BUT THE RING WAS STILL IN THE PISTON GROOVE & THERE WAS NO DAMAGE NOTED TO THE PISTON LAND OR CYLINDER WALL. A PARTIAL DISASSEMBLY OF THE CARBURETOR REVEALED THERE WAS APRX 2 OUNCES OF FLUID IN THE BOWL. APPRX 1/4 OF THE FLUID WAS WATER. EXCEPT FOR SOME SOOT ON THE SPARK PLUGS, NO OTHER DISCREPANCIES OF THE ENG WERE FOUND.
Source: NTSB Aviation Accident Database
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