As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED VIBRATION FROM NR 1 ENGINE ON CLIMB. CREW DUMPED FUEL AND RETURNED TO LAX. FOUND EVIDENCE OF BIRD STRIKE IN NR 1 ENGINE INLET. ACCOMPLISHED BIRD STRIKE INSPECTION PER AMM 72-00-00 AND 05-51-14. REPLACED 7 DAMAGED FAN BLADES PER AMM 72-31-02.