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, CORROSION WAS DETECTED ON THE UPPER WING EXTERNAL PLATING BETWEEN WING STATION XFS 172 AND XFS 255. REPAIR ACCOMPLISHED, CORROSION REMOVAL OF THE DAMAGE ARE, FABRICATION AND INSTALLATION OF A REPAIR DOUBLER IN ACCORDANCE WITH THE DOUGLAS STRUCTURAL REPAIR MANUAL AND FAA DER APPROVED DRAWING Q38-R02.