As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED LOUD VIBRATION ON TAKEOFF AND LT FAN VIBRATION OF 1.6. CREW RETURNED TO FIELD AND LANDED WITHOUT INCIDENT. MAINTENANCE COMPLIED WITH BIRD STRIKE INSPECTION AND FOUND DAMAGE TO LT ENGINE FAN BLADES FROM BIRD STRIKE. NO OTHER DEFECTS NOTED. MAINTENANCE R & R DAMAGED FAN BLADES ON LT ENGINE AND PERFORMED CHECKS IAW AMM. ACFT RELEASED FOR SERVICE.