As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT IN BASE MAINTENANCE: FOUND CORROSION ON MAIN CABIN FLOOR BEAM FLANGE, FORWARD SIDE, AT STA 986.5 AND LBL 44.5 TO RBL 44.5 REMOVED CORROSION FOUND TO BE OUT OF LIMITS IAW B737NG 53-70-51-12. REMOVED AND REPLACED ENTIRE "T" CAP IAW B737NG SRM 53-70-51-2R FIG 204 REPAIR 4.