As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW RECEIVED ECAM MESSAGE FOR GREEN HYDRAULIC SYSTEM LOW. MANUAL LANDING GEAR EXTENSION WAS REQUIRED DUE TO GREEN SYSTEM FAILURE. RETURNED TO PHX AND DECLARED AN EMERGENCY. RESET MANUAL GEAR EXTENSION HANDLE AND REPLACED GREEN RESERVOIR LOW LEVEL SWITCH IAW AIRBUS MAINTENANCE MANUAL 29-11-41-000-003.