As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING C-4 CHECK, INSPECTION REPORTED SURFACE CORROSION ON AFT GALLEY FLOOR INTERCOSTAL AT STA. 957, LBL 18.75 THRU LBL 40.5. FOUND CORROSION TO BE OUT OF LIMITS PER SRM 51-30-02. FABRICATED AND INSTALLED REPLACEMENT INTERCOSTAL PER EA 53-737-198 AND SRM 51-30-02.