As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING ROUTINE CPCP INSPECTION, FOUND LEVEL 2 CORROSION: FLOOR SUPPORT BETWEEN LBL 10 AND RBL 10 STA 1321 CORRODED. REMOVED AND REPLACED FLOOR SUPPORT IAW B747 SRM 51-10-01 AND 51-30-02. CORROSION TASK CARD NUMBER C53-210-06. NON-ROUTINE TASK CARD NUMBER 11636.