As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SJU INFLIGHT MIA-BGI CREW REPORTED CENTER HYDRAULIC SYSTEM QUANTITY SLOWLY DECREASING. FLIGHT DIVERTED SJU LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND HYDRAULIC PUMP B-NUT LEAKING. REPLACED 0-RING. SYSTEM GROUND CHECKED NORMAL OPERATION CLOSED.