As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING TROUBLESHOOTING OF PILOT DISCREPANCY, ACFT WOULD NOT PRESSURIZE AFTER TAKE OFF. DUCT, PN 8215533-1 IN AFT EQUIPMENT BAY WAS FOUND WITH ABNORMAL HOLE IN BELLOWS AREA. REF IPC 21-51-66, FIGURE 40, ITEM 60. TSN 5321.44 CSN 4302. DUCT REPLACED WITH NEW.