Flashcards in Pneumatics & Air Conditioning Deck (25)
Air for the pneumatic system is received from the ___ th (low pressure) and ___ th (high pressure) stage bleed air, the _______ and ________ air sources.
The pneumatic system distributes air for the following systems:
High pressure 14th stage bleed air is normally used for ______ engine thrust and ___________ system operation.
A _________ limits the bleed air temperature to a maximum 299ºC by using engine _______ air.
The crossbleed valve opens in the auto position in the event of _______ or _______ start operations
In normal operations, the _____ pack valve automatically closes in icing conditions below _________ feet.
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 ________.
APU bleed air is connected to the ________ side of the pneumatic system
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.
An ________ inscription illuminates above the white stripe in the APU bleed button to indicated that the APU bleed valve is ______.
The ground air connection for engine starting is located on the _______ aft side of the aircraft
The temperature indication for bleed air down stream of the pre-cooler can be found on the _______ page of the _______.
The _______ are installed forward of the aircraft wing root inside the wing-to-fuselage fairing.
The temperature in the cockpit and cabin may be controlled __________, or ___________ through control knobs located on the _________ panel.
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
In the automatic mode the temperature is controlled between _____ ºC and _____ºC
There are ____ electrical recirculation fans that are powered through the ______ buses. The recirculation fan on/off button is located on the __________ panel.
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 ___________.
The Gasper fan provides air through the individual outlets and also provides ventilation for:
Aft Avionics Bay
The Gasper fan can be turned off when the aircraft is _______ but not when the aircraft is ________________.
On the ground
An automatic system cools the nose ________ __________ where most of the electronic equipment is installed.
The "BLD 1(2) OVTEMP" caution message means the associated __________ downstream temperature is above 305ºC.
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 ___________