As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT WING, NR 4 SLAT, LOWER SURFACE TRAILING EDGE SKIN, MISSING EITHER RUB STRIP OR REPAIR. CLEANED CUT OUT ON LOWER SURFACE AND FOUND IT WAS MISSING A RUB STRIP FILLER. FABRICATED A NEW FILLER, ALODINED AND PRIMED AND BONDED THE FILLER.