As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING SCHEDULED INSPECTION WE FOUND THAT BLEED AIR TUBE PN 6955300-9 CRACKED AT THE APU FIREWALL BULKHEAD TO BLEED AIR TUBE ASSEMBLY ATTACH FLANGE. THE CRACK WAS TWO TO THREE INCHES LONG LOCATED AT THE WELD BETWEEN FLANGE & TUBE ASSEMBLY. A NEW TUBE ASSEMBLY WAS ORDERED & INSTALLED. WE HAVE FOUND THIS SAME DEFECT ON ACFT IN THE PAST.