As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-CHECK INSPECTION FOUND RIGHT WING UPPER SURFACE AT REAR SPAR, FROM XORS 264 TO XORS 480 SKIN CORRODED AT SEVERAL PLACES. REPAIRED RIGHT WING SURFACE AT REAR SPAR FROM XORS 264 - XORS 480 AT AREAS OF CORROSION PER ECRA 242NW-57-DC10-017.