As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APU CDU FAULT VERBAL FROM FLT CREW. CDU FAULT FIM 49 52240 SHOWING. WITH APU RUNNING SET APU BLEED SWITCH TO ON NO DUCT PRESSURE REGISTERD. CHECKED AT BLEED VALVE FOUND IN CLOSED POSITION. REPLACED BLEED VALVE REF MM 49 52 11 400 801. OPS CHECKED BLEED AIR VALVE REF MM 49 52 11 400 801 STEP F. OPS CHECKS LEAK CHECKS GOOD NO FAULTS LOGGED IN CDU. OK FOR SERVICE.