As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN AFT FLOOR STRUCTURE WET AREA, FLOOR BEAM FLANGE SURFACE CORROSION NOTED. GROUNDED - YES. REMOVED CORROSION, ORIGINAL THICKNESS 0.150. REMOVED 0.020,REMAINING THICKNESS 0.130. FOUND TO BE OUT OF LIMITS IAW B737-800 SRM 53-70-51-1A-1. T8224K CAL DUE 10/13/22. REMOVED AND REPLACED TEE CAP SECTION IAW B737-800 SRM 53-70-51-2R-4.TEE CAP SECTION REPLACED WAS FROM PREVIOUS REPAIR.