As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSPECTION TYPE:C, LEFT BLG WHEEL WELL AFT BULKHEAD STA 1480 APU DUCT PASSING HOLE CUTOUT SUSPECT CRACKED AT 10:30 POSITION AS MARKED. LEFT BS 1480 BULKHEAD WEB APU DUCT CUTOUT REPAIR CARRIED OUT AS PER EO B747-5310-C APPENDIX B FIG 4 AND DWG 144U2602.