As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EWR - FLT 1556 - THE AIRCRAFT LOST A-SYSTEM HYDRAULIC FLUID ON APPROACH TO EWR. THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE NR 1 ENGINE DRIVEN HYDRAULIC PUMP AT FAULT. THE PUMP WAS REMOVED AND REPLACED. THE ENGINE WAS RUN AND LEAK CHECK WAS GOOD. (X)