As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: QNH FLASHED STD DESCENDING THROUGH 250. LEVEL 230 STILL FLASHING. DESCENDED THROUGH 180 STD PUSH AND NOT FLASHING. GOT CABIN PRESSURE LOW DIFFERENTIAL PRESSURE SAFETY VALVE OPEN ECAM MESSAGE. UNABLE TO CONTROL CABIN PRESSURE IN MANUAL MODE. TURNED OFF BOTH PACKS OPENED RAM AIR VALVE LANDED ON GROUND SAFETY VALVE CLOSED AND SWITCHED TO SYSTEM 2. OPERATED NORMAL PACKS ON RAM AIR CLOSED. MAINTENANCE REPLACED OUT FLOW VALVE (AALA202209126329) AND #1 CABIN PRESSURE CONTROLLER (AALA202209123727) A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED.