As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 702 SJU-JFK, CREW DECLARED EMERGENCY DUE TO HYD Y RSVR OVHT AT CRUISE. ON APPROACH PER QRH, ENGINE PUMP WAS TURNED ON FOR LANDING WITH NO OVERHEAT. REMOVED AND REPLACED TEMP TRANSMITTER FOR THE YELLOW HYD SYSTEM. LEAK AND OPS TEST OK PER AMM 29-33-11-04.