As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT WAS NOT GROUNDED. LHR FLIGHT 745 EN-ROUTE BCN - CLT. THE FLIGHT RECEIVED ECAM AIR BLEED LOW TEMPERATURE MESSAGE DURING CRUISE. THE FLIGHT DECLARED AN EMERGENCY AND DIVERTED TO LHR WITHOUT FURTHER INCIDENT. MAINTENANCE PLACED THE LEFT BLEED SYSTEM ON MEL DEFERRAL. REPLACED NR 1 ENGINE FAN AIR VALVE AND NR 1 ENGINE FAN AIR CONTROL THERMOSTAT (SEE SDR AALA201806159014) PER AMM 36-11-43 AND 36-11-54.