As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED TO DEPARTURE DUE TO A PRESSURIZATION PROBLEM. THERE WAS NO EMERGENCY AND THE FLIGHT LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. ECAM VENT SKIN VALVE FAULT THEN VENT BLOWERFAULT IN FLIGHT. FOLLOWED BY VENT EXTRACT FAULT AFTER LANDING. MAINTENANCE REPLACED SKIN AIR OUTLET VALVE IAW MM 21-26-53. AIRCRAFT WAS GROUNDED.