As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED TO FIELD AT ORD UNDER AMBER ALERT DUE TO A LEADING EDGE ASYMMETRY LIGHT. *S/D* FOUND A WIRE ASSOCIATED WITH THE LEADING EDGE SLAT SYSTEM SHORTING TO GROUND WHICH CAUSED THE SYSTEM FAULT AND SHUTDOWN. REPLACED THE WIRE AND RETURNED AIRCRAFT TO SERVICE WITHOUT FURTHER INCIDENT.