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 IRREGULAR FLAP CONFIGURATION. EICAS MESSAGE LEADING EDGE SLAT ASSYMMETRY DISPLAYED, LEADING EDGE ILLUMINATED WITH FLAP LEVER, ONE UNIT. PERFORMED PSEU BITE TEST AND NO FAULT. LEADING EDGE AND TRAILING EDGE FLAPS OPERATED NORMAL. UNABLE TO DETECT ANY DEFECTS.