As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN SECTION 41 FLOOR STRUCTURE CREASE BEAM INNER CHORD CORRODED ON UPPER SURFACE AT BS 334 LBL 60. CORROSION FOUND TO BE OUT OF LIMITS PER B737-800 SRM 53-10-15- 1A-1. REMOVED CORRODED INNER CHORD AND REPLACED WITH NEW INNER CHORD (P/N 654A0004-1073) IAW BOEING DRAWING 141A8110 SHEET 13 R EV A AND B737-800 SRM 51-40-02.