As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HEAVY EXFOLIATION CORROSION ON STRINGER 47R AT STATION 790, FORWARD PIT BILGE. REMOVED CORROSION AT STRINGER 47R STATION 790, FOUND TO BE OUT OF LIMITS 100 PERCENT MATERIAL LOSS. REMOVED DAMAGE AREA PER B747 SRM 51-30-02 FIGURE 1, NDT CHECKED NO CRACKS NOTED. REPAIRED PER B747 SRM 53-10-03 FIGURE 1. INSTALLED PER B747 SRM 53-10-03 PAGES 2-3,8-9.