As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN FLOOR BEAM STA 312 RBL 12 - LBL 12 TOP OF FLOOR BEAM WENT OUT OF LIMITS AFTER CORROSION REMOVAL. REMOVED UPPER TEE AT STA 312 LBL 18 TO RBL 22 AND A STIFFENER AT BETWEEN STA 312 AND 328 LBL 12 IAW SRM 51-40-02; FABED AND INSTALLED CHORD IAW 53-10-51 FIG 205 AND REINSTALLED STIFFENER IAW 51-40-02