As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EXCESSIVE CABIN ALT ECAM ALERT ON DEPARTURE. SYS 2 VALVES SEEMED TO BE STUCK OPEN. ON INITIAL TROUBLESHOOTING, BOTH CAB PRESS REGULATORS SHOWED ACTIVE (GREEN TRIANGLE ON SWITCH). NR 2 REGULATOR WOULD ACTIVATE AND DEACTIVATE, BUT AS LONG AS NR 1 REG WAS ON IT SHOWED ACTIVE. NR 1 CPC BITE CHECKED GOOD, EXCEPT FOR THE MAN DEPRESS VALVE OPEN CKT AND THE NR 2 CPC WOULD NOT TEST. REMOVED AND REPLACED SYSTEM NR 1 CABIN PRESSURE CONTROLLER REF A310 MM 21-31-11-4.