As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF FROM SUMU, HAD HIGH VIBRATION NR 3 ENGINE. DUMPED FUEL TO MAX LANDING WEIGHT AND RETURNED TO FIELD FOR A SAFE LANDING. AFTER LANDING ENGINE NR 3 WAS SHUT DOWN AS PRECAUTION. ON POST FLIGHT INSPECTION, FOUND 6 DAMAGED FAN BLADES WITH EVIDENCE OF BIRD STRIKE. ACCOMPLISHED BIRD STRIKE INSPECTION IAW 72-00-02, NO OTHER DAMAGE NOTED. REPLACED 4 FAN BLADES AND BLEND 2 BLADES PER AMM 72-31-02. AIRCRAFT RETURNED TO SERVICE.