As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - PHX - EL - LOG 7827212 - CREW REPORTED, DURING CRUISE THEY RECEIVED A GREEN HYD RESERVOIR LOW LEVEL ECAM MESSAGE. THE CREW DECLARED AN EMERGENCY. THE LANDING WAS UNEVENFUL. MX REPLACED THE LEFT AILERON SERVO VALVE DUE TO IT LEAKING. OPERATIONAL/LEAK CHECK WAS GOOD. THE A/C WAS RETURNED TO SERVICE.