PORT O'CONNOR, TX, USA
N520EH
BELL 206B
THE HELICOPTER SUSTAINED A LOSS OF TAILROTOR DRIVE ON LIFT OFF. A BONDING IN A SHAFT COUPLING FAILED. EXTENSIVE RESEARCH AND ANALYSIS DISCOVERED NO DISCREPANCIES IN DESIGN, PRODUCTION, QUALITY ASSURANCE, MAINTENANCE OR OPERATING ENVIRONMENT THAT COULD HAVE RESULTED IN THIS FAILURE. ONLY ONE PREVIOUS OCCURRENCE WAS DOCUMENTED, IN AN ASSEMBLY FROM ANOTHER VENDOR.
Source: NTSB Aviation Accident Database
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