As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT PRESSURE BULKHEAD AT STA 2360, LT STR 30-31, FOUND OIL CANNING. OIL CANNING MEASURED AT STA 2360 LT STR 21 TO STR 22: L=4" X W=5" X D=0.028"; STR 22 TO STR 23: L=4.5" X W=4" X D=0.025"; STR 23 TO STR 24: L=7.375" X W=6" X D=0.036 FOUND WITHIN LIMITS AS PER SRM 53-10-01 REV 116, FIGURE 1 SHEET 14. HFEC INSPECTION CARRIED OUT AS PER B747 NDTM D6-7170 REV 134 PART 6, 51-00-00 FIGURE 23. NO CRACK ON THE OIL CANNING AREA.