APU Flashcards
Auxiliary Power Unit
1
Q
APU use for pressurization
A
Can’t be used for pressurization
2
Q
MAX rotor speed
A
110%
3
Q
Starting limits APU with airplane batteries
A
3-30sec with 20 mins off, 3-30sec with 1 hr off
4
Q
Starting limits APU with external DC
A
2-15sec with 20 mins off, 2-15sec with 1 hour off
5
Q
Successful start limit
A
6 per hour at 10mins interval
6
Q
APU Start guaranteed
A
SL to 15K feet at 250 KCAS or less
7
Q
Inspection Intervall for the APU
A
10 APU hours if operated 1 hour above FL300 or 5 times above FL350
8
Q
Temp Load APU 36-100(G) limits
A
Max EGT 0 to 60% - 988°C,
from 60% to 100% - 821ºC to 732ºC
Normal running - 732ºC, w/ APU air - 680ºC
9
Q
Temp Load APU 36-150(G)
A
Max EGT 0 to 50% - 973°C,
from 51% to 87% - 973ºC to 732ºC
from 88% to 100% - 732ºC
Normal running - 732ºC, w/ APU air - 680ºC
