Air Conditioning and Pressurization Flashcards
Can Air source to Trim air only be selected on the ground?
No
What is the max differential pressure on the ground ?
0.1 psi
What is the max positive differential pressure?
9.4 PSI
What is the max negative differential pressure ?
-0.5 PSI
Where is the outflow valve located ?
Front right wing fairing
How is the outflow valve actuated ?
DC ELECTRIC MOTORS
What computer controls the outflow valve?
IASC
What cabin altitude triggers a caution light?
8500ft
What cabin altitude triggers a warning light?
9400ft
How many feet are added to cabin altitude to readjust for a high alt mode caution light ?
650ft
How many feet are added to cabin altitude to readjust for a high alt mode warning light?
1550ft
What is the automatic landing altitude return to base criteria ?
6000ft or 10 min
How many safety valves does the Challenger 350 aircraft have ?
2
What is the purpose of the safety valves?
To prevent over and under pressurization of the cabin
How is the landing altitude normally set?
Automatically by the FMS
How is the landing manually set?
By selecting MAN on the pressurization panel.
What indicates the landing altitude is set automatically ?
It is shown in magenta
What indicates the landing altitude as been set manually ?
It is displayed in cyan
Where is the cabin zone temp sensor?
Mid cabin right side
Where is the cockpit zone temperature sensor?
Left side of center pedestal next to the pilots right knee
What is the guarded EMER DEPRESS PBA for?
For fresh air circulation and if fumes or smoke enter the cockpit
What air sources can provide air to the packs?
Engines, APU and ground air cart
Into what manifold does the ground air cart feed?
The right manifold
What are the limitations for Trim air usage?
Do not use on the ground
When must the PACK be operating while on the ground?
When the aircraft electrical power is on ( Batt or external power) for more than 30 min with an OAT OF >40’C
What is the pressurization limitation during landing?
1.0 PSI
When does the automatic Pull Up and Pull down function operate?
On the ground with the main cabin door open
What type of air is used for pressurization?
IP AIR. ( Intermediate )
Where is Delta P displayed ?
EICAS summary page
ECS synoptic page
How many IASC computers does the Challenger 350 aircraft have?
2
What is the temperature range in NORM mode?
15 - 35 degrees
What is the temperature range in manual mode?
10-70 Degrees
What valve divides the left manifold from the right manifold ?
Crossbreed valve
T or F
The bleed valves are pneumatically operated and electrically controlled?
True
To what PSI is the intermediate pressure regulated ?
50 +/- 3 PSI
To what PSI is the high pressure bleed air regulated ?
36 +/- 3 PSI
For what is high pressure bleed air used?
For engine and wing anti ice
What does the PACK provide?
Air conditioned air for fuselage compartments
How is the APU bleed valve controlled ?
The APU ECU
What computer monitors the bleed air leak detection system ?
IASC
How many ozone converters are installed in the Challenger 350 aircraft ?
2
