2. Air Systems Flashcards
0
Q
What are the pack flow modes on the 748?
A
Economy
Normal and
High
1
Q
What controls the packs on the 748?
A
IASC
Integrated Air Systems Controler
2
Q
When does the 748 packs go to economy mode?
A
- cruise above FL250
- high flow switch off
- all cargo temp selectors off
3
Q
When is the NGS shut down?
A
- engine out ops
- Equipment Cooling Selector is in OVRD
- right bleed air duct is isolated
- a cargo fire arm switch is ARMED
4
Q
When does the NGS shut down after landing?
A
With pack 3 operating and TAT above 16° it shuts down after 7 min
Below 16° it shuts down immediately after landing
5
Q
If a pressure relief valve is open which pack shuts down?
A
Pack 2
6
Q
How many Pack Temperature Controller are there and how many channels do they have? (744)
A
2 PTC (A and B) and they have 3 channels each (1 per pack)
7
Q
What controls the packs on the 748?
A
IASC
Integrated Air System Controller
8
Q
What is the default temperature on the upper deck and crew rest upon power up?
A
24°
