As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF FELT A HIGH FREQUENCY VIBRATION IN THE TAIL ROTOR PEDALS. RETURNED TO HOUMA. MAINTENANCE FOUND THE TAIL ROTOR TO HAVE A .4 IPS VIBRATION. SINCE THE TAIL ROTOR WAS DUE SCHEDULED CHANGE IN 12 HOURS, MAINTENANCE ELECTED TO CHANGE AND BALANCE THE TAIL ROTOR.