What was found
DFW-BHM - FLT 1412 - EN ROUTE, HYDRAULIC SYSTEM 1 LOW QUANTITY ALERT CAME ON. ON APPROACH NR 1 HYDRAULIC SYSTEM FAILED, ACCOMPLISHED ALTERNATE GEAR EXTENSION. LANDED BHM WITHOUT INCIDENT. REPLACED O-RING ON NR 2 ENGINE PUMP. PRESSURE CHECKED SYSTEM, NO LEAKS. SYSTEM GROUND CHECKED NORMAL OPERATION. (Z)