What was found
PTY - FLT 0770 - THE A-SYSTEM HYDRAULIC LOW PRESSURE LIGHT FLICKERED ON AND OFF AFTER TAKEOFF AND WAS FOLLOWED BY LOSS OF THE A-SYSTEM HYDRAULIC QUANTITY. THE AIRCRAFT WAS RETURNED TO PTY WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE NR 2 ENGINE HYDRAULIC PUMP CASE SPLIT. THE NR 2 HYDRAULIC PUMP WAS REMOVED AND REPLACED. IN ADDITION, THE NR 1 ENGINE HYDRAULIC PUMP WAS REPLACED AS A PRECAUTIONARY MEASURE. OPERATIONAL AND LEAK CHECKS AFTER HYDRAULIC SYSTEM SERVICING WERE GOOD. (X)