As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE C-CHECK INSPECTION, THE LEFT OUTBOARD AILERON LOWER PLATING SURFACE WAS FOUND TO BE CORRODED BETWEEN STATIONS XW500 AND 577. THE PLATING WAS REPLACED IAW THE STRUCTURAL REPAIR MANUAL 51-1-21 AND FAA DER APPROVED SKETCH A89-R05. (M)