APU Limitations

Question 1

Maximum APU N speed

Answer 1

107%

Question 2

Maximum EGT for APU start below FL250 (APU Type 1)

Answer 2

900ºC

Question 3

Maximum EGT for APU start above FL250 (APU Type 1)

Answer 3

982ºC

Question 4

Maximum EGT for APU running with 5 sec. confirmation for shutdown (APU Type 1)

Answer 4

682ºC

Question 5

Maximum EGT for APU running for immediate shutdown (APU Type 1)

Answer 5

700ºC to 742ºC

Question 6

Maximum EGT for APU start below FL350 (APU Type 2)

Answer 6

1090°C

Question 7

Maximum EGT for APU start Above FL350 (APU Type 2)

Answer 7

1120°C

Question 8

Maximum EGT for APU running (APU Type 2)

Answer 8

675°C

Question 9

Maximum APU altitude to assist engine start

Answer 9

20000ft

Question 10

Maximum APU altitude for air conditioning (Single Pack) (Type 1)

Answer 10

20000ft

Question 11

Maximum APU altitude for air conditioning (Single Pack) (Type 2)

Answer 11

22500ft

Question 12

Maximum APU altitude for air conditioning (Dual Packs)

Answer 12

15000ft

Question 13

How much time must crew wait after 3 consecutive APU start attempts?

Answer 13

60 minutes