Flashcards in Air Conditioning Deck (51)
The ____pack provides air directly to the flight deck with excess air flowing to the mix manifold.
The ____pack and the __________ also enters the mix manifold which is then distributed to the cabin.
right , recirculation system
A _____ pack in ____flow will maintain pressurization and acceptable temperatures throughout the a/c operating envelope.
The APU can supply suffient bleed air for ____ packs on the ground but only ____ pack in flight.
T/F: A single engine can be used to operate 2 packs.
AUTO on the temperature selector does what?
provides automatic temp control for that part of the cabin.
ZONE TEMP lights indicate what?
a problem with the associated zone temperature. The duct has overheated and the trim air modulating valve closes to prevent further overheat. A TRIP RESET can work to reopen the valve provided the duct has cooled.
CONT CAB light indicates:
a duct temp overheat or failure of both flight deck pri and stby temp control.
FWD or AFT CAB indicates:
a duct temp overheat
RAM DOOR FULL OPEN indicates what:
ram air doors in the full open position (blue light)
what does TRIM AIR do?
opens and closes the pressure regulating and shutoff valve.
L or R RECIRC FAN in auto means :
fan operation is dependent on the PACK settings.
PACK light indicates:
the pack has tripped off or both pri and stby pack controls have failed or an overheat is sensed.
If a fault condition has been corrected and the TRIP RESET is pressed what happens?
resets the BLEED TRIP OFF, PACK or ZONE TEMP lights and the related valves open.
Conditioned air for the flight deck branches into what 3 things:
floor, ceiling and foot level outlets. Provides warming or cooling and defogging.
How is conditioned air routed to the cabin?
via an overhead distribution duct
With both packs in AUTO, what happens when one pack stops?
the other goes to high flow.
When does automatic switching for single pack ops not occur?
on the ground or with flaps extended in flight.
With APU bleed on and BLEED switches to OFF, what happens?
The packs go to high flow, regardless of teh # of operating packs or air/ground status or flap position.
T/F: Ram air pack doors open and close normally in flight, depending on cooling requirements.
For max cooling on ground or during slow flight with flaps no fully retracted, the ram air doors move to the ______.
full open position (indicated by blue RAM DOOR FULL OPEN light).
What is the point of the ram air deflector doors?
prevent slush ingestion into ram air inlets prior to liftoff and after touchdown.
Ram air deflector door is dependent upon what?
state of air-ground safety sensor.
T/F: the pack temp control valve opens & closes in response to electronic controllers, depending on discharge flow req'd.
T/F: With both pack controllers failed, the pack will continue to operate unless excessive temps cause the pack to trip off.
CONT CAB refers to what?
the flight deck
Temperature ranges for conditioned air can be set to a range of _____
18C to 30C.
T/F: The zone which requires the most cooling causes both packs to produce an air temp to satisfy that zone.
With the TRIM AIR switch in ON and one pack inop, what happens?
Zone temp control is same as two pack ops. All three individual temp settings are upheld.