As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO YELLOW HYDRAULIC SYSTEM RESERVOIR LOW LEVEL ECAM MESSAGE. THE AIRCRAFT LANDED AT THE SCHEDULED STATION (PHX) SAFELY AND WAS TOWED TO THE GATE. MAINTENANCE FOUND THE #2 ENGINE HYDRAULIC PRESSURE PIPE LEAKING AND REPLACED IT PER AMM 29-13-49, A SATISFACTORY LEAK CHECK WAS ACCOMPLISHED.