What was found
ORD - FLT 0321 - EN ROUTE, DURING CRUISE, GEAR DOOR OPEN LIGHT ILLUMINATED. PERFORMED ABNORMAL PROCEDURE, TURNING ON RIGHT ENGINE HYDRAULIC PUMP TO HIGH TO EXTINGUISH LIGHT. LANDED ORD WITHOUT INCIDENT. POSITIONED MAIN GEAR DOORS' SENSORS AND TARGETS TO PROPER POSITION PER MM. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)