As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN AFT WET AREA INTERCOSTAL AT LBL 51 STA 947 HAS SURFACE CORROSION. (FOR ESFR ENTRY PURPOSES)(REF AAR N/R 9926329) REMOVED AND REPLACED INTERCOSTAL BETWEEN STA 947.50 TO 967.00 LBL-51'' AS PER B-737-900-SRM 51-40-02-0G-0 AND DWG-#147A5650. REMOVED AND REPLACED INTERCOSTAL BETWEEN STA 947.50 TO 967.00 LBL-51'' AS PER B-737-900-SRM 51-40-02-0G-0 AND DWG-#147A5650.