As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE LOWER SKIN PANEL OF THE KEEL BEAM STRUCTURE WAS FOUND WITH AREAS OF CORROSION BETWEEN FS 661 & 724 AND BETWEEN LBL 6 & RBL 6. THE DAMAGED PANEL WAS REMOVED AND A NEW PANEL FABRICATED AND INSTALLED. THE REPAIR WAS ACCOMPLISHED PER BAC S/B 737-53-1104 AND ER/A 087153-14.