As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHEN SELECTING APU BLEED VALVE FROM OFF TO ON FOR START, A MOMENTARY APU BLEED VALVE MESSAGE DISPLAYED, LASTED APPROXIMATELY TWO SECONDS AND CLEARED. PERFORMED TEST OF APU PNEUMATICS IAW AMM 36-00-00-862. PRESSURE NORMAL NO FAULTS NOTED AT THIS TIME.