As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
B737-MP-2000-53-410-00-01 MAIN CABIN FLOOR BEAM STA 947.5 HAS CORROSION ON THE UPPER SURFACE AT APPROX LBL53. REMOVED DAMAGED CHORD (UPPER) REPLACED & INSTALLED NEW REPAIR PARTS AT STA 947.5 FROM LBL41 TO LBL58.6 WL 208 IAW SRM 53-70-51-2R-5 REPAIR 5 ALTERNATIVE 2.