As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT RETURNED TO MIA ON ACCOUNT OF YELLOW HYDRAULIC SYSTEM ENGINE PUMP OVERHEAT. AN EMERGENCY WAS DECLARED AND THE FLIGHT LANDED WITHOUT INCIDENT. MAINTENANCE INSPECTED #2 EDP CASE DRAIN FILTER AND FOUND CONTAMINATION IN THE DRAIN FILTER. MAINTENANCE REMOVED AND REPLACED THE #2 EDP IAW AMM 29-13-51. OPS CHECK GOOD. UPON REMOVAL, FOUND THE DRIVE SHAFT SHEARED AT THE ACCESSORY GEAR BOX.