As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
VIBRATION-NOISE ENCOUNTERED IN FLIGHT. REF FLT MANUAL 12.20.1 NEED TO COMPLETE VIBRATION REPORTING CHECKLIST AND DEBRIEF MAINTENANCE (SAMC) ON ARRIVAL TO DESTINATION STATION. CREW COMMENTS: LIGHT VIBRATION ABOVE FL200+ 300 KNOTS. STOPPED FL300+ BELOW 290 KNOTS. FELT IN ALL AREAS. ACP RUDDER SERVO CONTROL EXCESSIVE PLAY CK PER MM. FOUND BLUE SERVO CONTROL ROD END WITH EXCESSIVE PLAY. REPLACED ROD END PER MM. RECHECK FOUND WITHIN LIMITS.