As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO SJU DUE TO HYDRAULIC SYSTEM A QUANTITY LEVEL LOW. AIRCRAFT LANDED SAFELY AT SJU WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED HYDRAULIC SYSTEM A QUANTITY TRANSMITTER PER 29-33-12-401.