As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PASSENGER CABIN; STA 947 LBL 25 WL 208; UPPER SURFACE OF INTERCOSTAL HAS CORROSION UNDER LAV MOUNT / REMOVED CORROSION ON INTERCOSTAL UPPER SURFACE STA 947 LBL 25 FOUND ORIG T .210' WITH .053' LOSS AND .155' REMAINING TO BE OUT OF LIMITS IAW B737 SRM 53-70-51-1A-1. REMOVED AND REPLACED INTERCOSTAL 147A5660-21 IAW B737 SRM SRM 51-40-02 AND DWG 147A5650 ID 0054 REV A