As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IAH-DURING C-CHECK INSPECTION, THE APU BLEED DUCT WAS FOUND TO BE CRACKED BETWEEN THE AFT PRESSURE BULKHEAD AND THE APU FIREWALL. MAINTENANCE REMOVED AND REPLACED THE AFFECTED SECTION OF BLEED DUCT, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.