As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PASSENGER CABIN FLOOR STRUCTURE STA 312-344 LBL55; CREASE BEAM INNER CHORD IS CORRODED. / CREASE BEAM FOUND TO BE OUT OF LIMITS DUE TO CRACK AT STA 303 LBL 55 REMOVED AND REPLACED WITH NEW CREASE BEAM IAW SRM 51-40-02-0G-0 AND B 737 DWG 141A8110 REV - APPLIED CIC TO NEW CREASE BEAM IAW AMM 51-21-91-620-802 A TAG # X51661 P/N 141A81121