As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT CREW REPORTED DURING CLIMBING OUT THE ENG DRIVEN GREEN HYDRAULIC SYSTEM PUMP FAILED AND A LOW PRESSURE WARNING ECAM MESSAGE. THE FLIGHT CREW DECLARED AN EMERGENCY AND RETURNED TO DEPARTURE. AIRCRAFT GROUNDED. MAINTENANCE ACCOMPLISHED TSM 29-11-00-810-804-A AND REPLACED THE NR 1 ENGINE PUMP PRESSURE SWITCH IAW AMM 29-11-17. A SATISFACTORY LEAK AND OPERATIONAL CHECK WAS ACCOMPLISHED.