What was found
THE A-HYDRAULIC SYSTEM WAS LOST WHILE EN ROUTE FROM IAH TO AUS. THE LOSS WAS ACCOMPANIED BY ILLUMINATION OF PUMP LOW PRESSURE LIGHTS 1 AND 2. THE AIRCRAFT WAS RETURNED TO IAH WHERE IT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE NR 5 L/E FLAP ACTUATOR SEALS BLOWN. THE ACTUATOR WAS REMOVED AND REPLACED. THE HYDRAULIC SYSTEM WAS SERVICED TO FULL. LEAK AND OPERATIONAL CHECKS WERE GOOD. PART TOTAL CYCLES, 31,400.