Pneumatics & Air Conditioning Flashcards
The pneumatic system distributes air for the following systems:
______________ ____________
______________ ____________
Engine Starting
Air Conditioning
Pressurization
Ice Protection
Air for the pneumatic system is received from the ___ th (low pressure) and ___ th (high pressure) stage bleed air, the _______ and ________ air sources.
9
14
APU
ground
High pressure 14th stage bleed air is normally used for ______ engine thrust and ___________ system operation.
low
thermal anti-ice
A _________ limits the bleed air temperature to a maximum 299ºC by using engine _______ air.
pre-cooler
Fan
The crossbleed valve opens in the auto position in the event of _______ or _______ start operations
ice conditions
engine
In normal operations, the _____ pack valve automatically closes in icing conditions below _________ feet.
1
24,600
The environmental control units (ECUs) consist of 2 ____________ (ACMs) which air condition the aircraft.
Air Cycle Machines
The APU can supply bleed air for pressurization and temperature control on the _________ or in ________.
Ground
air
APU bleed air is connected to the ________ side of the pneumatic system
left
The APU bleed valve is electrically ________ if the left engine bleed is open or the right engine bleed valve is open with the CBV selected open.
Closed
An ________ inscription illuminates above the white stripe in the APU bleed button to indicated that the APU bleed valve is ______.
Open
Open
The ground air connection for engine starting is located on the _______ aft side of the aircraft
Right
The temperature indication for bleed air down stream of the pre-cooler can be found on the _______ page of the _______.
ECS
MFD
The _______ are installed forward of the aircraft wing root inside the wing-to-fuselage fairing.
ECUs
The temperature in the cockpit and cabin may be controlled __________, or ___________ through control knobs located on the _________ panel.
Automatically
Manually
overhead
When the cabin knob is in automatic (knob pushed in) and in the ______ detent, cabin temperature can be directly controlled by either the temperature controller in the Galley or by the controller at the VIP seats
Attd
In the automatic mode the temperature is controlled between _____ ºC and _____ºC
18
29
There are ____ electrical recirculation fans that are powered through the ______ buses. The recirculation fan on/off button is located on the __________ panel.
2
shed
overhead
Recirculation air is pulled from beneath the cabin _________ and mixed with air from the ______. If the _______ valve is deselected, the associated recirculation fan is also ___________.
Floor
ACM
Pack
Inoperative
The Gasper fan provides air through the individual outlets and also provides ventilation for:
_____________
_____________
_____________
Aft Avionics Bay
Relay Boxes
O2 Compartment
The Gasper fan can be turned off when the aircraft is _______ but not when the aircraft is ________________.
Airborne
On the ground
An automatic system cools the nose ________ __________ where most of the electronic equipment is installed.
avionics compartment
The “BLD 1(2) OVTEMP” caution message means the associated __________ downstream temperature is above 305ºC.
pre-cooler
The “PACK 1(2) OVLD” message means the associated ECU _________ temperature is above 470ºF (243ºC), or ECU ______ pressure is above 55 psig. Which cause the associated pack to ___________
compressor
inlet
Shutdown
The “Pack 1(2) OVHT” message means the associated ECU outlet temperature is above _______ which causes the associated pack to _____________
93ºC
shutdown
