As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS NOT GROUNDED. EMERGENCY DECLARED. NRT-ORD FLIGHT RETURNED TO NRT ACCOUNT RIGHT AIR CONDITIONING PACK FAILED INDICATION. OVERWEIGHT LANDING UNEVENTFUL. REMOVED AND REPLACED RIGHT CABIN AIR COMPRESSOR INLET DEFLECTOR DOOR ACTUATOR PER AMM B787-A-21-51-16-00A. OPERATIONAL CHECK GOOD.