APU

Question 1

APU Can be operated ____ (when?).

Answer 1

on the ground and in all phases of flight.

Question 2

APU air cannot be used to provide____to the aircraft in flight.

Answer 2

pressurization airflow

Question 3

APU may be used to provide starter assisted airstarts below _____

Answer 3

30,000 ft

Question 4

APU Max operating altitude

Answer 4

45,000 ft

Question 5

APU 100% Gen load is_____(kVA)

Answer 5

40 kVA Sea level to 45,000 ft

Question 6

Max EGT for APU Start

Answer 6

1050°C

Question 7

Max EGT for Running APU

Answer 7

732°C

Question 8

Max APU Rotor Speed

Answer 8

106%

Question 9

APU Starting limits (on A/C battery)

____ attempts followed by a ____ cool down.

Answer 9

3 Consecutive attempts followed by a 1 hour cool down.

Question 10

APU is guaranteed to start below what altitude?

Answer 10

37,000 with ASC 123

Question 11

APU may start between what altitudes?

Answer 11

37,000 ft and 39,000 ft with ASC 123

Question 12

In the event of a dual generator failure, crew should initiate APU start at or below what altitude?

Answer 12

30,000 ft

Or 37,000 w/ ASC 123