As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED EXCESSIVE VIBRATION OF PROPELLER WHILE AIRCRAFT WAS TAXIING. INSPECTION OF PROPELLER FOUND NR 1 BLADE TO BE EXCESSIVELY LOOSE. FURTHER INSPECTION FOUND BLADE PIN BEARING TO BE WORN TO 0.053 WALL THICKNESS ON ONE SIDE AND WEARING IN AN OVAL FASHION AND BLADE PIN WORN. REPLACED PIN AND BEARING AND RETURNED BLADE TO SERVICE.