As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 12 - PHX - RETURN TO FIELD - CREW RECEIVED ENGINE NR 1 BEARING 4 SYSTEM HIGH PRESSURE FAULT. AFTER RECEIVING A SECOND ACARS MESSAGE OF OIL QUANTITY SLOWLY DROPPING, CREW ELECTED TO RETURN TO PHX. MAINTENANCE FOUND THE SCAVENGE VALVE STUCK CLOSED. REMOVED AND REPLACED THE NR 1 ENGINE BEARING 4 SCAVENGE VALVE IAW AIRBUS MAINTENANCE MANUAL 79-23-51.