GRANDVIEW, WA, USA
N11VH
BELL 47G-2
WHILE DISPENSING HERBICIDE (SYSTOX) OVER AN APPLE ORCHARD THE PILOT SENSED THAT THE ENGINE WAS BINDING FOLLOWED BY A POWER LOSS. THE PILOT ELECTED TO DUMP THE HERBICIDE AND PERFORMED A POWER-OFF AUTOROTATION LANDING IN A GRAPE VINEYARD. INVESTIGATION REVEALED THAT THE #5 CYLINDER CONNECTING ROD HAD OVER HEATED AT THE BEARING JOURNAL, THE BOLT BROKE AND THE CAP SEPARATED AT THE PARTING SURFACE.
Source: NTSB Aviation Accident Database
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