As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRFRAME VIBRATION STARTED 16000FT (300 KNOTS). SW1416 ASSIGNED RUDDER INTEGRITY CHECK. SAMC TEXT: CREW DID NOT FILL OUT VIBE FORM BUT WAS DEBRIEFED AND SAID THAT THE VIB WAS LATERAL IN NATURE IN THE AFT GALLEY AREA POINTING AT THE RUDDER. PERFORMED SW1416. FOUND ON EXCESSIVE PLAY CHECK, BLUE SYSTEM MEASURED 11.7MM AND LIMIT IS 10MM. REPLACED BLUE SYSTEM ACTUATOR ROD END PER MM. RECHECK END PLAY OKAY.