As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: HYDRAULIC GREEN RESERVOIR LOW LEVEL ECAM 30 MINUTES AFTER TAKE OFF. COMPLIED WITH ECAM PROCEDURES, DECLARED AN EMERGENCY AND RETURNED TO PHX WHERE THE AIRCRAFT LANDED SAFELY WITHOUT FURTHER INCIDENT. MCDU SHOWED FAILURE MESSAGE FOR SYSTEM PRESSURE SWITCH, REPLACED SWITCH AND ACCOMPLISHED A SATISFACTORY LEAK / OPERATIONAL CHECK PER AMM 29-32-12 AND 29-11-00.