As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT ATTENDANTS STATED FELT SUBSTANTIAL VIBRATION IN AFT CABIN AND FORWARD CABIN FOR ABOUT 1 MIN. FOUND EXCESSIVE RUDDER FREE PLAY IN THE SERVO ROD ENDS. REPLACED ALL THREE RUDDER SERVO ROD ENDS. AT HMV, RUDDER HINGE BEARINGS REPLACED, ELEV HINGE BEARINGS REPLACED AND LEFT ELEV GREEN SYS SERVO FAILED FREE PLAY CHECK AT HMV. REPLACED LEFT ELEV GREEN SERVO.