WASHINGTON, IA, USA
N73205
BELL 47G-2A
THE HELICOPTER WAS BEING AIR TAXIED TO THE REFUELING LOCATION WHEN IT CRASHED. THE PILOT SAID HE HAD LIFTED OFF AND WAS ABOUT 6 FT AGL WITH ABOUT 20 KTS FORWARD SPEED WHEN HE SUDDENLY FELT A SNAP AND THE CYCLIC WENT FULL LEFT. THE HELICOPTER BECAME UNCONTROLLABLE AND FLEW INTO THE GROUND. AN INVESTIGATION REVEALED THAT A BOLT, PN 20-057-4-16D, USED TO SECURE THE LATERAL SERVO TO THE AIRFRAME, WAS NOT IN PLACE. ACCORDING TO THE PILOT, THE NUT WAS NOT PROPERLY SECURED AFTER MAINTENANCE WAS PERFORMED ON THE LATERAL CYCLIC CONTROL.
Source: NTSB Aviation Accident Database
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