What was found
THE AIRCRAFT LOST A-HYDRAULIC SYSTEM WHILE EN ROUTE. THE HYDRAULIC LOSS CHECKLIST WAS COMPLETED AND THE AIRCRAFT LANDED AT EWR WITHOUT INCIDENT. MAINTENANCE FOUND NR 1 ENGINE A-SYSTEM HYDRAULIC PRESSURE LINE CRACKED. THE HYDRAULIC PRESSURE LINE WAS REMOVED AND REPLACED. IN ADDITION, THE NR 1 AND NR 2 ENGINE DRIVEN HYDRAULIC PUMPS WERE REMOVED AND REPLACED. LEAK AND OPERATIONAL CHECKS WERE GOOD.