As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING INSPECTION FOUND CORROSION BLOW OUT INSIDE APU INLET MARKED ON AFT SIDE INTERIOR. MAINTENANCE REMOVED STIFFENER FOR REPLACEMENT. DRILLED UP NEW STIFFENER PER DWG 148A8650. REPLACED CORRODED STIFFENER PER DWG 148A8650. INSTALLED NEW STIFFENER PER DWG 148A8650.