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 A YELLOW HYDRAULIC SYSTEM RESERVOIR OVERHEAT ECAM MESSAGE DURING CLIMB OUT. FLIGHT CREW ACCOMPLISHED ECAM PROCEDURES AND LANDED SAFELY AT CLT WITHOUT FURTHER INCIDENT.MAINTENANCE FOUND THE YELLOW HYDRAULIC SYSTEM ENGINE DRIVEN HYDRAULIC PUMP SHAFT HAD SHEARED ON #2 ENGINE. MAINTENANCE REPLACED THE HYDRAULIC PUMP AND ACCOMPLISHED A SATISFACTORY LEAK / OPERATIONAL CHECK PER AMM 29-13-51.