As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH TO ORD THE FLAPS WOULD NOT EXTEND. CREW RETURNED TO MKE, THE LANDING WAS UNEVENTFUL. MAINTENANCE TROUBLESHOT TO FAILED FLAP RESET SWITCH WHICH CAUSED THE SYSTEM TO STICK IN SELF-TEST MODE. REPLACED FLAP RESET SWITCH. OPS CHECKED GOOD.