As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR RETURN DUE TO CABIN PRESSURIZATION FAILURE. NO PRESSURIZATION ON TAKEOFF. CLIMBED TO MAXIMUM OF 9000 FT CABIN PRESSURE MATCHED BARO DURING WHOLE FLIGHT. ECAM "ON LANDING" CAB PR OUTFLOW VALVE NOT OPEN. FOUND EMERGENCY RAM AIR INLET ACTUATOR CAUSING CABIN PRESSURIZATION FAULT, R & R EMERGENCY RAM AIR INLET ACTUATOR IAW 21-55-51, OPS CHECK GOOD. PERFORMED PRESSURIZATION ON ACFT IAW 21-55-51, OPS CHECK GOOD.