NTSB Identification: MKC86LA177.
The docket is stored on NTSB microfiche number 31802.
Accident occurred Friday, August 22, 1986 in GOODWIN, AR
Aircraft: GRUMMAN G-164, registration: N634U
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 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.

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

ENGINE ASSEMBLY..FAILURE,TOTAL

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

ENGINE ASSEMBLY,OTHER..FAILURE,TOTAL


Contributing Factors

TERRAIN CONDITION..NONE SUITABLE

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