As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIA - CREW REPORTED LEADING EDGE FLAPS TRANSIT NUMBER 4 LEADING EDGE LIGHT BEGAN GOING ON AND OFF. FLIGHT RETURNED MIA LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED NUMBER 4 LEADING EDGE FLAP EXTEND SENSOR. SYSTEM GROUND CHECK NORMAL OPERATION.