What was found
THE A-SYSTEM HYD PRESSURE AND QTY DROPPED TO ZERO WHILE APPROACHING IAH. THE HYD LOSS WAS ACCOMPANIED BY ILLUMINATION OF BOTH A-SYSTEM PUMP LOW PRESSURE LIGHTS. MANUAL GEAR EXTENSION AND ALTERNATE FLAPS WERE USED AND THE A/C LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE NR 1 A-SYSTEM SUPPLY LINE LEAKING IN LT INBD FLAP WELL AND THE NR 2 ENGINE DRIVEN HYD PUMP PAD LEAKING. THE HYD PUMP WAS REMOVED AND REPLACED. THE SUPPLY LINE WAS REPLACED USING A FLEX HOSE AND A DIP WAS ISSUED TO REPLACE THE FLEX HOSE WITHIN 500 CYCLES OR 1200 HOURS.