As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN HEAVY MX PERFORMING INSP, THE INTERNAL CABIN AFT PRESSURE BULKHEAD RT STATION 1183 LOWER LOBE WEB WAS CORRODED. FABRICATED LOWER LOBE WEB FROM 2024 T3 .040" R & R LOWER LOBE, NO OTHER DEFECTS NOTED. ACFT WAS RETURNED TO SERVICE.