Forward Overhead Panel 700/800/900
START (momentary) –
Positioning the APU switch from OFF to START and releasing it to
ON, initiates an automatic start sequence.
ON – Normal position when the APU is running.
The automatic start sequence begins with the opening of the air
inlet door. When the APU inlet door reaches the full open position
the start sequence begins. After the APU reaches the proper
speed, ignition and fuel are provided. When the APU is ready to
accept a bleed air or electrical load the APU GEN OFF BUS light
illuminates.