As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRFRAME VIBRATION FELT FOLLOWED BY INCREASED VIBRATION ON NR 3 ENGINE. ENGINE SHUTDOWN PER CHECKLIST, REPORTED TIME 16:50Z. REMOVED AND REPLACED LP FAN BLADES IAW MM 72-31-05, REMOVED 3 HOLE BALANCE WEIGHT FROM THRUST RING. RAN ENGINE NR 3, PERFORMED TEST NR 16 IAW MM 71-00-00. VIBRATION SURVEY WITHIN LIMITS. ENGINE OK FOR SERVICE.