NTSB Identification: MKC86LA086.
The docket is stored on NTSB microfiche number 30078.
Accident occurred Saturday, April 12, 1986 in ADVANCE, MO
Aircraft: GRUMMAN G164B, registration: N6609Q
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.

THE AIRPLANE WAS BEING OPERATED AS AN AGRICULTURAL AIRCRAFT WHEN THE ENGINE STARTED BACKFIRING AND THEN QUIT. DURING THE FORCED LANDING IN A PLOWED FIELD, THE AIRPLANE FLIPPED FORWARD TO THE INVERTED POSITION. INVESTIGATION REVEALED THE TEETH ON THE LEFT MAGNETO WERE ALL BROKEN OFF. A NEW MAGNETO AND A PROPELLER WERE INSTALLED AND AFTER GROUND RUN, THE ENGINE OPERATED NORMALLY. AFTER REPLACEMENT OF THE RUDDER, THE AIRPLANE WAS FLOWN OUT OF THE FIELD. AFTER REPLACEMENT OF THE ENGINE, THE AIRPLANE WILL BE RETURNED TO SERVICE.

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

IGNITION SYSTEM,MAGNETO..FAILURE,TOTAL

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