APU

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When the APU master switch is released (set to OFF), 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 APU fire pb switch

Normal electrical system being available, you may start the APU at:

Throughout the normal flight envelope

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 will:

Illuminates blue ON light, APU system is energized, air intake flap opens and APU starts as soon as start pushbutton is pressed.

APU bleed air is controlled:

By ECB

APU N indication turns amber on ECAM SD, when:

N ≥102%

APU EGT indication becomes red on ECAM SD, when:

EGT ≥ 675°C (APU running) or EGT ≥ 1090°C (during APU start)

On ground APU provides:

Electrical power + bleed air

Air bleed extraction for Wing Anti-Ice:

Is not permitted

Can you start the APU using the A/C batteries only?

Yes

Fuel for 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 between 60 sec and 120 sec

The AVAIL light illuminates on the APU start pushbutton when:

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

The APU has its own lubrication system:

Yes

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

Electronic Control Box (ECB)

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

Either (Pushing the APU FIRE pushbutton) or (Pressing APU SHUT OFF pushbutton on external interphone panel) are correct

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

Yes

When the Master Switch is selected ON, the:

ECB is electrically supplied

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

100%

What does the message LOW OIL LEVEL means?

Advisory message regarding APU oil level when aircraft is on the ground and APU not running

When will the APU fire extinguisher discharge automatically?

On ground only

What causes amber XX in the BLEED indication on APU SD page?

ADIRS 1 or 2 are not available or selected OFF, or the data from the ECB are invalid or not transmitted

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