As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON INTERCOSTAL FROM BS 769 TO BS 788 BETWEEN LONGERON 27RT TO 28RT AT MID CARGO COMPARTMENT. INTERCOSTAL WAS REMOVED AND NEW INTERCOSTAL WAS INSTALLED IAW SRM 51-30-2, 51-30-5 NEW INTERCOSTAL WAS FABRICATED IAW DWG 9915554, REV J AND SRM 51-10-2.