As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(LOG2955930) FOUND TOOLING MARKS ON RH FLOOR BEAM UPPER SURFACE AT STA. 380. REMOVED TOOLING MARKS ON RH FLOOR BEAM UPPER SURFACE AT STA. 380 IAW B737-900 SRM 51-10-02, CORROSION FOUND OUT OF LIMITS. C/W REPAIR AT MAIN CABIN RH FLOOR BEAM UPPER SURFACE AT STA. 380 PER DELTA ERA 611237-14.