As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LHR - INFLIGHT CDG-JFK. CREW REPORTED LEFT HYDRAULIC QUANTITY LOSS AND PRESSURE PROBLEMS. EMEREGNCY DECLARED FLIGHT DIVERTED LHR LANDED WITHOUT INCIDENT. FOUND RIGHT OUTBOARD AILERON PCA SEAL DAMAGED. REPLACED SEAL. SYSTEM GROUND CHECK NORMAL OPERATION.