As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - ON ARRIVAL LEADING EDGE FLAPS TRANSIT LIGHT ILLUMINATED. FLAPS SET TO 5 DEGREES. EMERGENCY DECLARED, LANDED ORD WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED FLAP SLAT ELECTRONICS UNIT. INSPECTED ALL SENSORS AND TARGETS NO FAULTS FOUND. SYSTEM GROUND CHECKED NORMAL OPERATION.