AUXILIARY POWER UNIT

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When the APU master switch is released, a normal APU shutdown occurs:

with a delay if the bleed air was in use

What are the APU manual shut down possibilities in the cockpit?

APU master switch pb and APU fire pb switch

Normal electrical system being available, you may restart the APU up to:

41, 000 ft

When the APU is running, the APU fuel pump:

runs when tank pumps pressure is not sufficient

Normal APU rotation speed (N%) is:

100%

APU Master Switch selected ON:

ON illuminates blue. APU system is supplied. APU starts as soon as start pb is depressed and intake flap completely open

APU bleed air is controlled:

by ECB

APU N indication becomes amber on ECAM SD, when:

N ≥102%

APU EGT indication becomes RED on ECAM SD, when:

EGT ≥ 1090°C and 675°C (start and running)

On Ground, APU provides:

electric power + bleed air

Air bleed extraction for Wing Anti-Ice:

is not permitted

Can you start the APU using the A/C batteries:

Yes

The APU is supplied from the:

left fuel feed line

If Air bleed was used, after a manual shut down sequence the APU:

keeps running for a cooling period of 60 sec.

AVAIL light illuminates on the Start pb when:

APU N reaches above 99.5% or 2 sec after N reaches 95%

The APU has its own lubrication system:

Yes

What determines the APU speed in accordance with air bleed demand:

electronic control box

Besides the master switch on the cockpit APU panel, APU shutdown is possible by:

both (pushing the APU fire push button) and (pressing APU shut off pb on external Interphone Panel under the nose fuselage) are correct

The supply of electrical power has priority over bleed air supply:

Yes

Master switch ON, the:

ECB is electrically supplied

On ground normal APU rotation speed (N%) without air conditioning is:

100%

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