As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION FOUND CORROSION WEB - INTERCOSTAL LOCATED BETWEEN BS492 TO BS500A AT LEVEL STR26R AT FWD CARGO COMPARTMENT. REPLACED WEB - INTERCOSTAL (SHIELD) LOCATED BETWEEN BS492 TO BS500A AT LEVEL STR26R AT FWD CARGO COMPARTMENT AS PER B737-900ERSRM 51-40-02 AND DRAWING 143A0080 SHEET 39.