As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT LOST A-SYSTEM HYDRAULIC PRESSURE AND QUANTITY DURING CLIMBOUT. THE AIRCRAFT WAS RETURNED TO EWR WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND AN A-SYSTEM HYDRAULIC PRESSURE LINE CRACKED. THE HYDRAULIC LINE WAS REMOVED AND REPLACED. IN ADDITION, THE NR 1 ENGINE DRIVEN HYDRAULIC PUMP WAS REMOVED AND REPLACED. LEAK AND OPERATIONAL CHECKS WERE GOOD.