As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED LOUD NOISE AND AIRFRAME VIBRATION ASSOCIATED WITH RT ENGINE. DURING T/O SHOWED 4.0 FAN VIBS. FOUND BLADES 11 AND 12 WITH FOD FROM BIRD. REPLACED BLADES 1 12 30 AND 31. BOROSCOPE FOUND HPC STAGE 1 WITH A SHINGLED BLADE LOOSENED SAME PER M/M 72-36-00. RAN ENGINE AND PERFORM VIBE SURVEY. ALL WITHIN LIMITS.