PLT SAID HE ATTEMPTED TO MAKE A GO AROUND DUE TO OTHER ACFT ON THE RWY. WHEN THROTTLE WAS ADVANCED ENGINE REMAINED AT IDLE POWER. PLT ELECTED TO LAND IN CORN FIELD AT END OF RWY. ON LANDING ROLL ACFT NOSED OVER INVERTED. LATER EXAM OF ENGINE SHOWED THROTTLE ARM WORN WHICH WEDGED ARM IN IDLE POSITION. THROTTLE SPRING COULD NOT OVERCOME WEDGED POSITION TO PULL THROTTLE ARM TO FULLY OPEN POSITION. PLT ACC REPORT NOT COMPLETE FOR FLT TIME.

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

Contributing Factors

TERRAIN CONDITION..CROP

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