As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HIGH RUDDER VIBRATION ACFT RUDDER TRIM WAS NOT TRIMMING DURING CLIMB OUT AND LEVEL FLIGHT-IAW TSM 05-50-00-810-801-A FLOW CHART INDICATES RUDDER AT FAULT. PERFORMED RUDDER T/E PLAY FOUND BLUE SYS SERVO WITH 17MM & YELLOW SYS WITH 15MM PLAY REF LOG PGS 2804116-2 AND 2804117-1 FOR FURTHER CORRECTIVE ACTION IAW AMM 27-24-00-200-002-A