As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE FUSELAGE RT SIDE AFT PASSENGER DOOR LOWER SILL INNER CHORD WAS FOUND WITH DEEP CORROSION ON THE ATTACHED FAIL-SAFE CHORD AT FS 1540. THE CORROSION IS OF DEPTH REQUIRING CUT OUT. THE CORROSION WILL BE REPAIRED IN ACCORDANCE WITH REF ER/A272246 REV C.