As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MEX - CREW REPORTED UNABLE TO EXTEND LEADING EDGE DEVICES, EXTENDED LEADING EDGE DEVICES WITH ALTERNATE MODE. EMERGENCY DECLARED FLIGHT LANDED MEX WITHOUT INCIDENT. INSPECTED RIGHT FLAP TRANSMITTER AND CLEANED CONNECTOR. CYCLED SEVERAL TIMES NO DISCREPANCIES NOTED. SYSTEM GROUND CHECK NORMAL OPERATION.