As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SJU INFLIGHT T1845/27APR - DURING CRUISE, GREEN HYDRAULIC QUANTITY DROPPED TO ZERO. LANDING GEAR LOWERED MANUALLY. CREW DECLARED AN EMERGENCY AND LANDED SJU WITHOUT INCIDENT. FOUND NUMBER TWO ENGINE HYDRAULIC PUMP CASE DRAIN LINE LEAKING AT B NUT. TIGHTENED CASE DRAIN LINE AND REPLACED ENGINE DRIVEN PUMP AND CASE DRAIN FILTER. SYSTEM GROUND CHECKED NORMAL OPERATION.