As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:C, LT WING OTBD AILERON UPPER L/E INBD SKIN PANEL FOUND CHAFING, WORN. LT WING OTBD AILERON UPPER L/E INBD SKIN PANEL AT BTN AIL STA84.75-126 AREA SKIN REPAIRED IAW RS R57-60-36959 & B747-5750-41883. FINAL CUTOUT SIZE 7.5" X 41.25" THIS REPAIR IS CLASSIFIED AS A MAJOR REPAIR WITH MATL 2024T3-0.050" AS REPAIR SKIN SECTION & SPLICE PLATE. REPAIR SIZE IS 7.25" X 70".