As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN CABIN FLOOR SUPPORT INTERCOSTAL CORRODED AT STA 986.5 RT. GROUNDED - YES. REMOVED CORROSION IAW SRM 51-10-02, NO ALLOWABLE DAMAGE STATED, DRILLED TO FIT NEW INTERCOSTAL IAW SRM 57-40-05 P/N 147A570541 PO:113779.2 AND BOEING DWG 147A5700 INTERCOSTAL INSTALLED ON N/R 41493 CUSTOMER CARD G2250993.