What was found
DURING C-4 CHECK, INSPECTION REPORTED INTERCOSTAL CORRODED BETWEEN STA 312 AND STA 328, RBL 12. REMOVED INTERCOSTAL BETWEEN STA 312 AND STA 328 AND FOUND CORROSION TO BE ON SHIM ONLY. REMOVED SHIM, FABRICATED AND INSTALLED REPLACEMENT SHIM PER SRM 51-40-02, 51-40-02 AND EA 53-737-195.