As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MEM/IAH - FLT 1760 - AFTER FLAP RETRACTION, NR 4 LEADING EDGE DEVICE DID NOT INDICATE RETRACTED. PERFORMED ABNORMAL PROCEDURE WITH THE SAME RESULTS. THE CREW RETURNED TO MEM AND LANDED WITHOUT ANY FURTHER DIFFICULTIES. CLEANED CONNECTOR AT SWITCH AND OPERATIONALLY CHECKED NORMAL. THE AIRCRAFT WAS RETURNED TO SERVICE. (X)