Pneumatics And Air Conditioning Flashcards
How many Bleed Monitoring Computers are there
2
What is the precooler outlet temp target
200C (warnings generated around 260-300)
Which part of the airplane has double loops to detect bleed air leaks
The wings
A bleed air leak will close the associated valve except for during ?
Engine start
When is emergency ram air inlet used
What are the criteria
Smoke removal
Loss of both packs
<1psi diff press (will open OF valve 50%)
What temp will the packs produce
The lowest demanded temp of all 3 zones
What is the temp range of the zone temp selectors
18-30 (24 in the middle)
What are the two numbers in each zone on the ECAM cond page
Upper zone temp
Lower duct temp
What are the flow rates for the 3 settings of pack airflow
When will it automatically go to high
80, 100, 120
When APU is supplying bleed air
At what cabin alt do you get the cabin alt warning
When does that number start pulsing
Above 9,550’
Above 8,800’
When does the cabin pressure controllers change
70sec after each landing (or if in manual mode for 10 secs)
When is abort mode triggered (LDG elev set to departure field)
If A/C is below 8,000’
Or climbed less than =5,075’ since takeoff with a rod of >200 for 30 sec
What are the 3 avionics vent configs
Open closed and intermediate
What is a nominal bleed air pressure
45 +/-5 psi
What does the ditching button do
Closes all valves below the water line
(Outflow valve, both avionics vent valves, emergency ram air inlet, pack valves)
How many motors can control the outflow valve
3
One for each CPC and one manual
When do the positive and negative safety valves open
-1 psi and 8.6 psi
What is the delta pressure just before takeoff and landing
Target is 0.1 psi
What is the max diff press target
8.06 psi
How many electric motors does the xbleed valve have. When are they used
Two motors
One uses during auto operation, the other for manual operation
What happens if one lane of the Air Conditioning System Controller fails ?
If both fail?
Backup lane takes over, no effect
Pack is lost
What happens if the hot air regulator valve is:
Failed open
Failed closed
If failed open, the trim air valves will still have all the hot air they want, no effect
If failed closed, regulation of individual zones is degraded. Pack 1 is set to cockpit temp, pack 2 is set to median cabin temp
When do the ram air inlet flaps open on landing
Below 70kts, after a 20 sec delay
