Pneumatic Flashcards
Can the APU bleed hydraulic reservoir
Yes
Pneumatic system has priority
Engines and then APU(closes automatically when engine bleed is available)
CLOSED light on APU bleed
APU bleed is turned off
LOW switch on engine bleeds
Uses P2.5 and closes P3 valve
Where the bleed air is pulled from
P2.5 and P3 form engines. APU
AUTO mode gets its air form
P2.5 and P3
What does the Packs control
Pressurization and AC
Will aircraft be pressurized in emergency transfer
No because pressurization and AC is on the main DC bus
Why does the RAM air has to be closed on the ground
PACs will overheat due to lack of ground cooling fan
Why do we keep recirc fans off on the cargo aircraft
Can interfere with smoke detectors
What setting are the PACs in during TO and Landing
LOW due to reduced performance
Why do we never put PACs on high
The packs will oveheat
What is powered by P3
Deice
Auto on PACs
Pressurizing
Does the valve close automatically for duck overheat, pack fail, bleed overheat
Duct overheat, valves have to be closed manually
Pack fail and bleed overheat close automatically
How much air is distributed to cockpit versus cabin
40% - 60%
