As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - CREW REPORTED SLAT DISAGREE LIGHT ON APPROACH WITH FLAP SLAT HANDLE IN SLAT EXTEND POSITION. RECYCLED HANDLE AND LIGHT WENT OUT. EMERGENCY DECLARED FLIGHT LANDED ORD WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED WEAK SLAT POSITION SENSOR AND ADJUSTED SLAT CONTROL VALVE. SYSTEM GROUND CHECK NORMAL OPERATION.