As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 1416 - EN ROUTE SJU-JFK, GREEN HYDRAULIC SYSTEM RESERVOIR QUANITITY SLOWLY DECREASED TO ZERO. AIR INTERRUPTED, RETURNED SJU AND LANDED WITHOUT FURTHER INCIDENT. REPLACED LEFT MAIN GEAR LOCK ACTUATOR FLEXIBLE HOSE. SERVICED HYDRAULIC SYSTEM. NO LEAKS NOTED. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)