As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BS 1240 LBL49-53 WING CTR SECTION UPPER SURFACE FOUND CORROSION. CORROSION BLEND OUT 0.161" BY 4" BY 7" EXCEED SRM LIMIT. BS 1240 LBL49-53 WING CTR SECTION UPPER SURFACE CORRODED AREA REPAIRED AS PER RS R57-14-35592 AND UPS ENGINEERING FILE NUMBER 747-57-20108.