As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN DECK CABIN SEAT TRACK CROWN AT STA 580 & 91.67 FOUND CORROSION AS MARKED. ENTERED AND DEFERRED FOR SDR REPORTING. NEW SEAT TRACK FABRICATED AS PER BOEING DWG65B28626 REV NEW. NEW SEAT TRACK AT CABIN STA 580 LBL 91.67 AREA INSTALLED AS PER B747-400 SRM 51-40-02.