As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - AFTER LANDING GEAR WAS EXTENDED THREE OUT OF FOUR ANTI-SKID LIGHTS ILLUMINATED. LEFT INBOARD LIGHT REMAINED OUT. CYCLED THE SYSTEM AND TESTED. NO CHANGE OF LIGHTS. LANDED ORD WITHOUT INCIDENT. FOUND ANTI-SKID CONTROL BOX INOPERATIVE. REPLACED ANTI-SKID CONTROL BOX. SYSTEM GROUND CHECKED NORMAL OPERATION.