As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SAL - MAJOR REPAIR - DURING C4 CHECK DISCOVERED CORROSION ON UPPER SHEET METAL AT FORWARD CARGO DOOR SILL STRUCTURE FROM FR27 TO FS 28 AT Y-590. NO ALLOWABLE LIMITS WERE FOUND IN THE AIRBUS SRM. MAINTENANCE REMOVED AND INSTALLED NEW UPPER SHEET METAL FROM FS 24 TO FS 28 AT Y-590 IAW AIRBUS 320 SRM 51-72-11 AND DRAWING D53231681.