As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDED UNDER AMBER ALERT DUE TO SLAT DISAGREE EICAS MESSAGE AND SYSTEM SHUTDOWN. *S/D* LEADING EDGE SLAT ACTUATOR FAILED CAUSING ACTUATOR TO BIND THE SLAT SYSTEM AND SUBSEQUENT SHUTDOWN. REPLACED THE POSITION NR 12 SLAT ACTUATOR AND RETURNED AIRCRAFT TO SERVICE.