As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: AFT CABIN WET AREA PASSENGER FLOOR STRUCTURE UPPER SURFACE AT STA 947.5 APPROX LBL 33 - FLOOR STRUCTURE AROUND LH AFT LAV AFT IB MOUNT HAS EVIDENCE OF CORROSION. FLOOR BEAM REPAIR DONE IAW SRM 53-70-51-2R-5 MIC# 6203148.