As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT, ECAM YELLOW SYSTEM HYDRAULIC SYSTEM DROPPED TO ZERO. EMERGENCY DECLARED. FOUND LEAK AT UNION AT ALTERNATE BRAKE DUAL DISTRIBUTION VALVE. REMOVED AND REPLACED UNION & PACKING IAW AMM 32-43-14. LEAK CHECKED GOOD. PERFORMED CHECK OF YELLOW SYSTEM & FILTERS IAW AMM 29-00-00-280-006-01. NO FAULTS FOUND. ADDED 3.5 GALLONS OF HYDRAULIC FLUID.