As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MAIN DECK LT FROM STA 1160 TO 1180 AND BETWEEN S-20L AND S-22L WINDOW FORGING HAS CORROSION UNDER FORGING. REMOVED WINDOW FORGING PER 747 SRM 51-30-02 AND REMOVED CORROSION PER 747 SRM 51-10-01. MINIMUM MATERIAL REMOVED. ALODINED AND PRIMED PER 747 SRM 51-10-02 AND SOPM 20-41-02. REINSTALLED WINDOW FORGING PER 747 SRM 51-30-02.