As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING 3C CHECK FOUND CAPTAINS AFT BULKHEAD IS CORRODED ON AFT LOWER INBD CORNER JUST ABOVE CROSSBEAM AT FS 280.00. THE ACFT WAS REMOVED FROM SERVICE. REPAIRED IAW EO CR-53MR-174. LEVEL OF CORROSION NOT SPECIFIED. THE ACFT WAS RETURNED TO SERVICE.