As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT OF STL, CREW REPORT EXCESSIVE VIBRATION COMING FROM THE AFT END OF THE AIRCRAFT. MAINTENANCE INSPECTED THE RUDDER I AND RUDDER II SYSTEMS PER AD 2008-05-02 (H) AND FOUND SEVERAL ATTACHMENT POINTS WORN. WORN HARDWARE WAS REMOVED AND REPLACED AS PER AD, APPLICABLE SERVICE BULLETIN, AND AMM PROCEDURES. SUCCESSFUL MAINTENANCE CHECK FLIGHT WAS PERFORM WITH NO DEFECTS NOTED.