As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK INSPECTION DISCOVERED EXFOLIATION CORROSION ON THE UPPER SURFACE OF THE LOWER RIGHT WING TRAILING EDGE SKIN BETWEEN WS 724.5 AND 740. AFFECTED AREAS WERE TRIMMED TO REMOVE CORROSION. FABRICATED AND INSTALLED REPAIR FILLERS WET WITH SEALANT. ACCOMPLISHED IAW EIAA, ENGINEERING CHANGE/REPAIR AUTHORIZATION NR 470-57-075-2 REV A.