What was found
AIRCRAFT LOST THE A-SYSTEM HYDRAULIC QUANTITY WHILE EN ROUTE. THE LOSS WAS ACCOMPANIED BY ILLUMINATION OF THE NR 1 A-PUMP PRESSURE LIGHT. THE HYDRAULIC QUANTITY LOSS AND HYDRAULIC SYSTEM FAILURE CHECKLISTS WERE ACCOMPLISHED AND THE AIRCRAFT LANDED AT IAH WITHOUT INCIDENT. MAINTENANCE FOUND HYDRAULIC PRESSURE LINE AT A-SYSTEM PRESSURE MODULE LEAKING. THE LINE WAS REPLACED USING FLEX LINE AND A DIP WAS ISSUED TO REPLACE THE FLEX LINE WITHIN 1200 HOURS OR 500 FLIGHTS.