What was found
DFW - FLT 2374 - AFTER TAKEOFF DFW TO ORD, NOTED HYDRAULIC FLUID ODOR THROUGHOUT CABIN AND LEFT HYDRAULIC FLUID QTY DECREASING. RETURNED TO DFW AND LANDED WITHOUT INCIDENT. REPAIRED LEAKING HYDRAULIC FLUID LINE CONNECTED TO HYDRAULIC FLUID TRANSFER PUMP. ACCOMPLISHED AIR CONDITIONING PACK BURN OUT AND REPLACED SEPARATOR BAGS. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)