As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION AFT CARGO BAY INTERCOSTAL BS767+2 S-27R WL150. CORROSION ON AFT CARGO BAY INTERCOSTAL BS 767 TO 787 STR 27R FOUND TO BE OUT OF LIMITS. REMOVED; REPLACED AND INSTALLED NEW INTERCOSTAL PER SRM 53-00-04-1A-1; SRM 51-40-02-0G-0; SRM 51-40-05-0G-0; AND DWG 146A8130.