As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU BLEED PRESSURE LOW DURING START 20PSI. MAINT TEXT: DD OK TO USE 3611G APU BLEED VALVE INOP BUT OPB REFUSAL NAME PAT. THIS ITEM HAS HISTORY AND MX IS REQUIRED. POSSIBLE BAD SURGE VLV, IGC ACTUATOR OR APU. CORRECTED FOR EASE OF HISTORY CHECK AND FURTHER TROUBLESHOOTING. REPLACE APU SURGE VALVE. OPS OKAY.