As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(B737-53-3-0711) MAIN CABIN LAV SUPPORT INTERCOSTAL STA 947 - 967 RBL 45 CORRODED ON UPPER SURFACE. REMOVED AND REPLACED INTERCOSTAL STA 947 TO 967 RBL45 IAW B737-800 SRM 51-40-02 AND BAC DWG 147A5760 REV:-. EVALUATED ORIG .080 DEPTH .045 REMAINING .035 FOUND TO BE OUT OF LIMITS IAW B737-800 SRM 53-70-51