GOODWIN, AR, USA
N634U
GRUMMAN G-164
THE AG ACFT WAS BEING USED TO SPRAY NUDRIN ON SOYBEANS WHEN THE ENGINE LOST POWER. THE PLT MADE A FORCED LANDING IN A RICE FIELD AND THE ACFT FLIPPED FORWARD TO THE INVERTED POSITION. INVESTIGATION REVEALED THE TWO-PIECE CAM REDUCTION GEAR CAME APART. AN AD HAD BEEN ISSUED IN 1966 THAT CALLED FOR REPLACEMENT WITH A ONE-PIECE GEAR AT THE NEXT ENGINE OVERHAUL AFTER 07-09-66. THIS ACCIDENT ENGINE RECEIVED ITS LAST OVERHAUL PRIOR TO THE ISSUANCE OF THAT AD.
Source: NTSB Aviation Accident Database
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