As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING REPAIR OF THE LT WING L/E, FOUND CORROSION IN AN AREA THAT IS NOT ACCESSIBLE WITHOUT REMOVING RIVETS AND THE DIFFUSER TUBE. THESE AREAS WERE BLENDED AND PRIMERED USING REPAIR DATA FROM MFG. THIS SITUATION WOUDL HAVE CONTINUED TO CORRODE WITHOUT ANY INDICATION HAD MX NOT BEEN NEEDED IN THIS AREA FOR OTHER REASONS.