As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
***CORROSION*** AT AFT PASSENGER CABIN ON FLOOR BEAM BS986 RBL43 WL208. / REMOVED AND REPLACED FLOOR BEAM AT BS986 FROM LBL9 TO RBL43 WL208 RIGHT HAND SIDE IAW SRM 53-70-51-2R-4 REPAIR 4; SRM 53-70-51-1A-1; SRM 51-40-02; AMM 20-60-07; DWG# 147A5730 REV A; DWG# 147A5730 REV A. TREATED AND PRIMED. 59042U 18FEB21 AS SHOWN ON EA 1-753-34184 REV IR.