As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ZERO DUCT PRESSURE WHEN APU BLEED SWITCH SWITCHED ON. STARTED APU AND PERFORMED BLEED AIR VALVE OPERATIONAL CHECK OPS CHECK NORMAL IAW AMM 49 52 11 400 801 STEP F APU BITE TEST SHOW NO MAINTENANCE MESSAGE THERE WAS AN INTERMITTENT FAULT OK FOR SERVICE REF FIM 49 51 00 810 803, NO HISTORY FOR 90 DAYS.