Pneumatics Flashcards
1
Q
What engine stages provide bleed air?
A
9th
• Always available.
14th
• Only depending on system demand for low thrust or anti-icing.
2
Q
PACK automatic shut down?
A
- Anti-icing on below 24,600ft, PACK 1 shuts off.
- Max thrust with engine bleed valves open and;
– Singe engine up to 9,700’ AGL
– Both engines up to 1,700’ AGL
If both packs close in flight, ram air valves open and recirculation fans turn off. (Ram air always closed on the ground)
3
Q
Gaspers
A
Cannot turn off on ground.
4
Q
Auto Pressure
A
Sets to 8,000ft if you forget to set it.
5
Q
Dump button
A
Opens both OFVs to try and hold cabin between 14,000–15,000 feet.
Button doesn’t work in Manual mode.
6
Q
Anti-Icing for
A
- Engine inlets
- Wings (Fail to the open position)
- Horizontal Stab
7
Q
Anti-Icing turns on when
A
Auto
• Ground above 25 knots and ice detected, all on.
All
• In flight.
• Ground above 25 knots.
Eng
• When engine running.
8
Q
When do probes get heat?
A
All sensors EXCEPT TAT when one engine is turned on..
TAT turn on with weight off wheels or override set to ENG.