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
