What was found
THE A-HYDRAULIC SYSTEM QUANTITY WAS LOST WHILE ON APPROACH. THE A-SYSTEM HYDRAULIC QUANTITY LOSS CHECKLIST WAS COMPLIED WITH AND THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE NR 2 SLAT ACTUATOR HYDRAULIC PRESSURE LINE CRACKED AT B-BUT. THE LINE WAS REMOVED AND REPLACED. THE A-HYDRAULIC SYSTEM WAS SERVICED TO FULL. IN ADDITION, THE NR 1 ENGINE DRIVEN HYDRAULIC PUMP WAS REMOVED AND REPLACED FOR NO OUTPUT. THE ENGINES WERE RUN AND LEAK AND OPERATIONAL CHECKS WERE GOOD.