As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN FLOOR SUPPORT BETWEEN STA 324 AND STA 345 AT LBL 20 HAS CORROSION ON UPPER SURFACE. REMOVED CORROSION AT MAIN CABIN FLR SUPPORT BETWEEN STA 324 AND STA 345 AT LBL 20 L=2.00" W=2.00" D=.015", FOUND TO BE OUT OF LIMITS IAW SRM 53-00-51 AD 51 DETAIL III. INSTALLED NEW FLR SUPPORT P/N 141N5170-30 PO SAG1850560 IAW SRM 51-40-02 PG 2 PARA 4.