As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PRESSURIZATION 2 FAILURE DISPLAYED ON UPPER ECAM. RESET CB PRESSURIZATION 1 THEN FAILED FOLLOWED BY ANOTHER NR 2 FAILURE. MANUAL MODE OK. RETURNED TO LAX. *S/D* PROBLEM CAUSED BY THE OUTFLOW VALVE MOTOR. REPLACED OUTFLOW VALVE MOTOR 10HL-3 PER MM 21-31-51-000-003 AND PERFORMED OPERATIONAL CHECK. FAULT CLEARED AND SYSTEM OPERATES NORMAL.