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 RT WING NR 26 L/E FLAP STIFFENER (CTR) OTBD END BOTH SIDES. REMOVED AND REPLACED THE 65B10783-1 HAT SECTION IAW B747 SRM 51-30-02 AND 51-10-1. CORROSION TASK CARD NUMBER C57-510-01 PART 2 OF 4. NON-ROUTINE TASK CARD NUMBER 12789.