As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - AIRCRAFT EXPERIENCED YELLOW SYSTEM HYDRAULIC LOSS. EMERGENCY DECLARED, RETURNED TO MIA WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND CHAFED HYDRAULIC PRESSURE HOSE. REPLACED HYDRAULIC PRESSURE HOSE. SYSTEM GROUND CHECK NORMAL OPERATION.