As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - CREW REPORTED TRAILING EDGE FLAP ASYMMETRY APPEARED ON UPPER EICAS / ALONG WITH YELLOW TRAILING EDGE ASYMMETRY ANNUNCIATOR WHEN FLAPS WERE EXTENDED FOR EMERGENCY DECLARED FLIGHT LANDED ORD WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED RIGHT OUTBOARD SLAT POSITION TRANSMITTER. SYSTEM GROUND CHECK NORMAL OPERATION.