What was found
FLIGHT CREW NOTICED AN IMMEDIATE LOCK-UP OF THE AUTOBRAKE SYSTEM UPON LANDING, AND ATC TOWER REPORTED SEEING AN UNUSUALLY LARGE AMOUNT OF SMOKE FROM LEFT MAIN GEAR. CREW REPORTED NO DIRECTIONAL LOSS OF CONTROL. AS THE AIRCRAFT TAXIED OFF THE RUNWAY, LEFT MAIN BRAKE WAS GRABBING AND REQUIRED APPROX 5 SECONDS OF PUMPING BRAKE PEDAL TO RELEASE THE AUTOBRAKE FUNCTION. EMERGENCY EQUIPMENT WAS CALLED OUT AS A PRECAUTION. MAINTENANCE INSPECTED THE BRAKES AND TIRES WITH NO TIRE FLAT SPOTS OR OTHER DISCREPANCIES NOTED. ACCOMPLISHED BITE CHECK OF BRAKE/STEERING CONTROL UNIT WITH NO FAULTS FOUND. THIS AIRCRAFT HAS NO PRIOR HISTORY AND WAS RETURNED TO SERVICE WITH NO SUBSEQUENT ISSUES TO DATE.