As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING THE STRUCTURAL INSPECTION, IT WAS FOUND ON FWD CARGO COMPT. BETWEEN BS 500G AND BS 520, (S-28L LEVEL) THE KEEL BEAM LOWER FLANGES CORRODED. THE REPAIR WAS CARRIED OUT UNDER ASAP E.O. #5322-020 REV-IR A INSTRUCTIONS WITH FAA FORM 8110-3 APPROVAL.