As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEADING EDGE DISAGREE EICAS MESSAGE AND LIGHT ILLUMINATED. FAILURE OF THE LEADING EDGE SLAT POWER DRIVE UNIT, (PDU), CAUSED THE LEADING EDGE SLAT AND TRAILING EDGE FLAP SYSTEMS TO SHUTDOWN AND PRODUCE THE LEADING EDGE DISAGREE EICAS MESSAGE. REPLACED THE LEADING EDGE SLAT PDU AND OPERATIONALLY CHECKED THE SYSTEM GOOD.