As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RUDDER VIBRATES WITH TRIM IN NEUTRAL POSITION. TRIMMING AWAY FROM NEUTRAL STOPS THE VIBRATION. RUDDER TRIM ACTUATOR REPLACED IAW MAINT MANUAL. RUDDER TRIM ACTUATOR PUSH-PULL ROD REPLACED AS A PRECAUTIONARY MEASURE. TRIM RIGGED IAW MAINT MANUAL. TRIM OPS CHECKED GOOD IAW MAINT MANUAL.