As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EN ROUTE FROM DFW TO PHX, ECAM INDICATED YELLOW SYSTEM HYDRAULIC QUANTITY LOW. CREW SHUT YELLOW SYSTEM DOWN AND CONTINUED TO PHX, LANDING UNEVENTFULLY. MAINTENANCE FOUND PARKING BRAKE VALVE LEAKING. MAINTENANCE REMOVED AND REPLACED VALVE. OPS CHECKED PER AMM 32-43-00. AIRCRAFT RETURNED TO SERVICE. (M)