As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CREW REPORTED A SEVERE VIBRATION FROM THE LEFT PROPELLER AT ALL POWER SETTINGS AND PROPELLER SPEEDS. MAINTENANCE FOUND THE NR 4 BLADE IN THE LEFT PROPELLER WITH AN EXTREMELY WORN BLADE PITCH CHANGE BEARING AND PIN. PROPELLER BLADE WAS REMOVED AND REPLACED. BALANCE WAS CHECKED AND FOUND TO BE WITHIN LIMITS. ALL WORK WAS DONE IAW HS MM. OPS AND LEAK CHECK WAS GOOD AND AIRCRAFT WAS RETURNED TO SERVICE. (M)