As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FUEL AUTO FEED FAULT ECAM MESSAGE. FUEL IMBALANCE BETWEEN LEFT AND RIGHT WING TANKS OF 1500 POUNDS. FOUND FUEL TANK PROTECTOR-OVERPRESSURE DISC BROKEN BETWEEN THE LEFT WING AND CENTER FUEL TANKS. THIS ALLOWED FUEL TO MIGRATE FROM THE LEFT WING TANK INTO THE CENTER TANK. REPLACED DISC.