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 AND THE AIRCRAFT DIVERTED TO PHX: ON DESCENT INTO TUS RECEIVED GREEN HYDRAULIC RESERVOIR OVERHEAT. THE AIRCRAFT LANDED SAFELY AT PHX WITHOUT FURTHER INCIDENT AND TAXIED TO THE GATE UNDER ITS OWN POWER. MAINTENANCE REPLACED LANDING GEAR SAFTEY VALVE 49GA PER AMM 32-31-17.