As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: RIGHT ENGINE VIBRATION REVERSE IMAGE 512 N STARTED DURING CLIMB. FLIGHT DECLARED AN EMERGENCY AND AIRCRAFT RETURNED TO LHR. CARRIED OUT ENGINE OVER MAX VIBRATION INSPECTION PER AMM DMC B787-A-G71-00-00-31A. FOUND NUMBER 11 BLADE BACKSIDE MATERIAL MISSING. REPLACED FAN BLADE PER WORK CARD 78L40071003. COMPLETED VIBRATION SURVEY TEST NUMBER 9. ALL FIGURES WITHIN LIMITS PER AMM B787-A-G71-00-00-31A.