As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN AFT WET AREA; FLOOR SUPPORT CORRODED ON UPPER SURFACE APPROX. BS 950 LBL 48.<[01] RED'D LOCATED AND DRILL NEW FLOOR SUPPORT PN 147A5676Y5 IAW BAC DWG 147A5650 REV - AND B737-800 SRM 51-40-05;[02] RED'D LOCATED AND DRILL NEW FLOOR SUPPORT PN 147A5676Y5 IAW BAC DWG 147A5650 REV - AND B737-800 SRM 51-40-05 FOR INSTALLATION SEE TTG8Q00UUN2N