As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: FINDING UPON THE REMOVAL OF AFT PRESSURE BULKHEAD LOWER SKIRT SEAL FOUND CORROSION AT INTERCOSTAL APPROXIMATELY AT STA 1030 AND LEFT BUTT LINE 30 TO LEFT BUTT LINE 41. REMOVED AND FABRICATED AND INSTALLED INTERCOSTAL PER SRM.