Auto Start

The FADECs take care of the engine start. They control the Starter Valve, fuel flow, etc and ensure against over temperature (EGT). For an automatic engine start, select the starter knob to the IGNITION position.

The system display will automatically change to show the Engine system display. The display changes back to the Doors page, if the master switch is not selected within 10 seconds.

Ensure that there is sufficient starter air pressure shown below the Starter Air SOV displays. The starter air pressure should be about 30 psi. The APU bleed should be supplying the air pressure

Select Engine 1 Master switch to ON. This begins the engine start sequence.

The starter air valve opens, and the Igniter indication is shown. The igniter are swapped from A to B etc every start.

The N2 value begins to increase, until about 30% N2, when the fuel flow is started

The FADECs close the starter air valve when the engines are stable at about 21% N1, 47% N2

After both engine start, the engine start knob should be returned to the normal position.

Parking Brake On

Engine fire warn test Done

Ensure that the aircraft is completely ready for engine start:

Auto Start

Engine master switches are off

Manual engine start buttons are off

Engine start knob is in normal position

APU running

APU Bleed air selected