As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:C RIGHT WING L/E CAVITY LWR EXTENSION SKIN FOUND CORRODED AT WS 1540 JUST BEHIND NR 26 VC FLAP. CORROSION BLEND OUT 0.053" X 1" X 2" EXCEED SRM LIMIT. RIGHT WING L/E CAVITY LWR EXTENSION SKIN AT WS 1512 AREA REPAIR PER RS R57-26-25675 AND UPS ENGINEERING FILE 747-57-20129.