APU OVERSPEED Light

llluminated (amber) –

  • APU RPM limit has been exceeded resulting in an automatic shutdown
  • Overspeed shutdown protection feature has failed a self-test during a normal APU shutdown
  • If light is illuminated when APU Switch is placed to OFF, light extinguishes after 5 minutes
  • Light is disarmed when the APU Switch is in OFF position.

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