As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT CARGO FLOORBOARD 140 CF CORRODED AT EDGE PREMITER. / REMOVED CORROSION FROM AFT CARGO PANEL 140CF. FOUND TO BE OUT OF LIMITS IAW B737 SRM 53-00-53-1A-1 FIG. 102 CORROSION IS OVER 20'. REPLACED WITH NEW PANEL P/N 453A2610-18 A# WN558