What was found
DURING LANDING AT MSP, FLIGHT TOUCHED DOWN BUT SPOILERS FAILED TO EXTEND SO CREW INITIATED A GO-AROUND. ONCE AIRBORNE, COMPLIED WITH COM PROCEDURES AND THE AIRCRAFT RETURNED AND LANDED USING MANUAL SPOILER CONTROL. APPARENTLY THE WIND CONDITIONS FOR LANDING WERE CAUSING EXCESSIVE FLOATING OF THE AIRCRAFT AND SPOILERS WERE NECESSARY. AFTER ENGINE SHUTDOWN AT GATE, THE SPOILER SYSTEM RECYCLED AND THE ANNUNCIATOR LIGHT EXTINGUISHED. MAINTENANCE REPLACED THE SPOILER CONTROL BOX AND THE AIRCRAFT RETURNED TO SERVICE.