As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON INSPECTING THE LEADING EDGE, FOUND WHAT APPEARS TO BE A CRACK ON THE LEFT WING INBOARD MOUNT BRACKET FOR NR 4 LE SLAT ACTUATOR. THE CRACK TRAVELS FROM THE RADIUS TOWARDS THE BOLT AT APPROX WING STATION 393. ANGLE WILL BE REPLACED WITH NEW PART.