As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU COMPARTMENT CROWN AREA AT STA 2638-2658 BETWEEN RIGHT STR 1 AND 2, FUSELAGE SKIN FOUND CRACKED. TRIMMED OFF CRACKED SKIN MATERIAL PER SRM 53-30-00 REV 116 FIGURE 1A. HFEC INSPECTION CARRIED OUT PER B747 NDTM D6-7170 REV 134 PART 6, SRM 51-00-00 FIGURE 23, FOUND NO CRACK EVIDENT. A 12 INCH BY 10.50 INCH DOUBLER FABRICATED PER SRM 53-03-03 REV 116 AND INSTALLED PER SRM 53-30-03 REV 116 A.