As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEADING EDGE SLAT ASYMMETRY MESSAGE DISPLAYED ON STATUS PANEL OF THE ENGINE INDICATING AND CREW ALERT SYSTEM (EICAS) AND FLAPS LOCKED OUT ELECTRICALLY DURING CRUISE. ASYMMETRY MESSAGE OCCURRED AT 17,000 FEET, 320 IAS, WITH FLAPS UP. USED ALTERNATE FLAPS FOR LANDING.