As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT WET AREA FLOOR STRUCTURE; FLOOR SUPPORT BTW STA 907 AND STA 927 POSSIBLE TOOL MARK LBL 15. (REF AAR NR 1000057481) REMOVED AND REPLACED AFT WET AREA FLOOR SUPPORT BTW STA 907 AND STA 927 LBL 15 IAW B737-800 SRM 51-40-02-0G-0 AND DWG 147A5676