APU

Question 1

if the apu LOW OIL LEVEL ECAM advisory is displayed….

Answer 1

The APU may be started.
Maintenance action is required
within next 10 h of APU operation.

Question 2

APU STARTER LIMITATIONS

Answer 2

After 3 starter motor duty cycles,
wait 60 min before attempting
3 more cycles.

Question 3

APU ROTOR SPEED LIMITATION

Answer 3

Maximum N

(ECAM display)…………. 107 %

Question 4

APU EGT LIMITATIONS

MSN 2204-2296, 3252, 3317

Answer 4

Maximum EGT for start:
Below 25 000 ft……………………………… 900 °C
Above 25 000 ft……………………………… 982 °C
Maximum EGT, with APU running:
‐ 682 °C, with 5 s confirmation time for shutdown, or
‐ From 700 °C to 742 °C for immediate shutdown.

Question 5

APU EGT LIMITATIONS
MSN 1140-1159, 2657-3175,
3253-3279, 3450-5212

Answer 5

Maximum EGT…………………………………….. 675 °C
Maximum for start (below 35 000 ft)……….. 1 090 °C
Maximum for start (above 35 000 ft)……….. 1 120 °C

Question 6

In the APU start envelope, the APU start is guaranteed within …..

Answer 6

3 consecutive start attempts

Question 7

APU Electric power

90 KVA extraction:

Answer 7

At or below 25 000 ft:

ISA + 35 °C and below

Question 8

APU MAXIMUM ALTITUDE FOR BLEED AIR

Answer 8

-TWO PACKS UP TO 15 000 ft
-ONE PACK UP TO 20 000 (22 500) ft
-ENG START:
UP TO 15 000 ft IF SPEED BELOW 150 kt
UP TO 20 000 ft IF SPEED ABOVE 150 (180) kt