As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CORROSION ON FLOOR BEAM UPPER SURFACE LBL 44. REPAIRED BS 986 FLOOR BEAM UPPER CHORD PER B737 SRM 53-70-51-2R-4 LBL 50 TO RBL 11. CORROSION DAMAGE FOUND TO BE OUT OF LIMITS PER B737 SRM 53-70-51-1A-1 PARA. 4 H (2),(B)(1) FIG 104 DETAIL C. CAUSE OF CORROSION: MOISTURE.