Original subtitles

This is a demonstration of an APU auto shutdown as a result of

high EGT.

The aircraft has left the runway and the APU needs to be started.

Select the APU master switch to initiate the start cycle.

Now select the APU start switch.

You hear the chime and see the Master caution extinguish the

Master Caution on the engine warning display.

Read the title of the failure.

The ECAM APU page is automatically displayed.

The ECAM Caution APU auto Shutdown appears amber to

indicate that the APU has initiated an automatic shutdown.

In this example, the EGT has exceeded the maximum limit.

Notice the red EGT indication on the ECAM APU page.

On the APU control panel, the fault light is eliminated on the

master switch.

This provides a cross check of the ECAM and locates the push

button to be activated in the procedure.

The APU has completed its automatic shutdown.

An automatic shutdown can also occur for other reasons, for

example, overspeed, slow start, low oil pressure, etcetera.

Now perform ECAM action.

Turn off the APU master switch.

Note that the blue on light in the master switch and the flap

open indication on the ECAM have disappeared, indicating that the

APU is fully shut down.

The abnormal procedure is complete.

After review and confirmation clear APU, The status page is

displayed.

The inoperative system is the APU.

After review and confirmation, clear status ECAM complete

screens normal.

The status reminder is displayed on the Engine warning display

note.

Automatic shutdown protection is available throughout the flight.

Let's now look at a situation which is similar to an APU auto

shutdown, but more critical, the APU emergency shutdown.

If an APU fire is detected on the ground, an APU emergency

shutdown occurs and the APU fire extinguisher bottle is

automatically discharged.

There is no crew action to be taken.

This will not happen in flight.

The crew must shut down the APU and fight an airborne APU fire.

An APU emergency shutdown also occurs when the APU shut off

push button on the external power panel is pressed or when

the APU fire push button on the fire panel is pressed.

However, in neither case is the fire bottle automatically

discharged on the ground.

An auto shutdown.

When APU parameters are exceeded, an emergency shutdown

with automatic extinguishing occurs.

If an APU fire is detected in flight, an auto shutdown will

occur for the same reasons as on the ground.

If an APU fire occurs, the crew must take action.

There is no automatic shutdown or extinguishing.

The APU emergency shutdown procedure is displayed at the

end of the APU fire procedure.

There are several other indications that could appear on

the APU ECAM page.

The low oil level advisory pulses in green if the APU oil

quantity approaches its minimum value.

Note Minimum quantity allows normal APU operation for an

additional 60 hours.

When starting the APU, the fuel low pressure indication appears

in amber when an APU fuel low pressure is detected.

Note, even though this message is in amber, it is an advisory.