Air Systems Flashcards
What would an amber temperature indication in either the Pack Outlet Temperature or Pack
Compressor Outlet Temperature indicate?
Excessive Temperature
How is the Hot Air Pressure Regulating Valve controlled?
HOT AIR PB on the overhead panel
If bleed air is being supplied by the APU or if one pack fails, pack flow will go to what rate?
HIGH
With the APU supplying bleed air, what will be the pack flow if the PACK FLOW switch is in LOW?
HIGH
There are three temperature selectors for the various zones in the aircraft. The pack controllers will
deliver air at the coolest demanded temperature to the mixing units. How are the individual zone
temperatures maintained comfortable if the air being demanded is always the coldest?
By mixing hot bleed air, through trim air valves into the distribution network
In flight, what happens if HP bleed air pressure is insufficient?
Engine speed is increased automatically
What is indicated by a FAULT light in the HOT AIR pushbutton?
Duct overheat.
The pack flow control valve automatically closes for engine start when the mode selector is moved to
IGN/START. When does the valve automatically reopen?
After successful start or 30 seconds
How many motors are installed on the crossbleed valve?
Two, one for the automatic mode and one for the manual mode.
Can external air be used to supplement low APU bleed pressure?
No
If the APU bleed valve is open and the X BLEED selector is in AUTO, what is the position of the X
BLEED valve?
Open
When would the RAM AIR pb be used?
Ventilation and/or smoke removal
What happens to the outflow valve when the RAM AIR pb is selected ON?
The outflow valve opens when cabin differential pressure is less than 1 psi
If SYS 1 (or SYS 2) were displayed in amber, what would be indicated?
System fault
What is indicated if the Cabin Vertical Speed is indicated in amber?
High Cabin rate of climb/descent
What occurs when the DITCHING pushbutton is selected ON?
All valves below the water line close, except the outflow valve if the CABIN PRESS MODE SEL is in
MAN.
With the LDG ELEV selector in Auto, what altitude is used for landing field pressurization reference?
FMGC database information
With the LDG ELEV selector at 2, what would be the landing elevation?
2,000 feet
When does the pressurization system switch auto-controllers?
After each landing
What does the FAULT light in the MODE SEL switch indicate?
Both automatic systems have faulted
Is cargo heat provided to the forward cargo compartment?
No
What ECAM page is selected to verify aft cargo compartment temperature?
ECAM COND Page
What would the FAULT light in the AFT ISO VALVE indicate?
A fault has been detected
How many CAB FANS are installed?
Two
If either the Blower or Extract pb is selected to OVRD, will the system run in the OPEN or CLOSED
configuration?
Closed.
