As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: PILOT REPORTS EMERGENCY DECLARED AND RETURNED TO MIA ON OF ACCOUNT HYDRAULIC SYSTEM MESSAGE ISSUE. FLIGHT WAS OVERWEIGHT, LANDED WITHOUT INCIDENT. MAINTENANCE REMOVED AND REPLACED GREEN SYSTEM LOW LIMIT SWITCH IAW AMM 29-11-41. OPS CHECK GOOD.