Display Selector
Ground Power and Bus Switching Panel
with associated APU Lights and Indicators
APU Fault  Light

Illuminated –

  • A malfunction exists causing the APU to initiate an
    automatic shutdown.

  • If the light is illuminated when the APU switch is placed to
    OFF, the light will extinguish after 5 minutes.

  • The light is disarmed when the APU switch is in OFF
    position.