As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
JFK - THE CREW REPORTED THAT THE AIRCRAFT HAD LOST THE YELLOW HYDRAULIC SYSTEM. EMERGENCY DECLARED LANDED JFK WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED YELLOW HYDRAULIC SYSTEM ENGINE DRIVEN PUMP ON NUMBER TWO ENGINE. SYSTEM GROUND CHECK NORMAL OPERATION.