As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
BS 1185-1187 LBL31-33 WING CTR SECTION UPPER SURFACE FOUND CORRODED. CORROSION BLEND OUT 0.056" BY 2" BY 3" EXCEED SRM LIMIT. BS 1185-1187 LBL31-33 WING CTR SECTION UPPER SKIN CORRODED AREA REPAIRED AS PER RS R57-14-35594 FIG 3 AND UPS ENGINEERING FILE NUMBER 747-57-20100.