APU Flashcards
0
Q
Max altitude for starting the APU
A
37,000 feet
1
Q
Max permissible load on the APU generator
A
40 KVA
2
Q
Max altitude for APU operation
A
41,000 feet
3
Q
Max altitude for APU bleed air extraction
A
25,000 feet
4
Q
Max speed with APU door open
A
If APU is not on 220 KTS otherwise no limitation exists
5
Q
What battery voltage is required before starting the APU?
A
22 volts on both batteries
6
Q
What does the main battery power during the APU start?
A
APU ECU
7
Q
What does the APU battery power during the APU start?
A
Cranking of the 28 volt DC start motor
8
Q
When will the APU AVAIL switch light illuminate?
A
99% RPM plus 2 seconds
