As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JFK - CREW REPORTED AIRCRAFT HAD LOST MOST OF THE CENTER HYDRAULIC SYSTEM FLUID. EMERGENCY DECLARED LANDED JFK WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED O-RINGS ON AIR DRIVEN PUMP FILTER MODULE DIFFERENTIAL PRESSURE INDICATOR. SYSTEM GROUND CHECKED NORMAL OPERATION.