APU Switch OFF – Normal position when APU is not running
- Positioning switch to OFF with APU running trips APU generator off
the bus(es), if connected, and closes APU Bleed Air Valve. APU continues to run for a 60
second cooling period
- APU air inlet door automatically closes after shutdown.
ON – Normal position when APU is running.
START (momentary) – Positioning APU Switch
from OFF to START and releasing it to ON, initiates an automatic start sequence. |