What was found
THE AIRCRAFT LOST A-SYSTEM HYDRAULIC QUANTITY DURING GEAR EXTENSION WHILE ON APPROACH TO IAH. ABNORMAL AND EMERGENCY PROCEDURES WERE FOLLOWED AND THE AIRCRAFT LANDED WITHOUT INCIDENT. MAINTENANCE FOUND THE LT GEAR DOOR HYDRAULIC LINE RUPTURED. THE HYDRAULIC LINE WAS REMOVED AND REPLACED. THE HYDRAULIC SYSTEM WAS SERVICED TO FULL AND LEAK CHECKS WERE GOOD.