As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN AFT @ L2 DOOR. FLOORBEAM CORRODED AT STATION 986. GROUNDED - YES. REMOVED CORROSION IAW B737-800 SRM 53-70-51. ORIG MAT IS .150, REMAINING MAT IS .103. MAT LOSS OF .047 IS BEYOND ALLOWABLE LIMITS. REMOVED UPPER T-CAP CHORD AND INSTALLED NEW T-CAP CHORD IAW B737-800 SRM53-70-51-2R-4 REPAIR 4. THIS IS A CAT A REPAIR.