As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CPCP INSPECTION FOUND LEVEL 2 CORROSION. CORROSION UNDER MAIN CARGO FLOOR SUPPORTS FS 855 10 TO RT OF FLOOR CENTER LINE AND FWD. REMOVED AND REPLACED CORRODED FLOOR SUPPORT IAW B747 SRM 51-10-01. CORROSION TASK CARD NUMBER C53-210-01 PART 3 OF 8. NON-ROUTINE TASK CARD NUMBER 12829.