AIR COND / PRESS / VENTILATION Flashcards
1 | Which valves will receive a close command when the DITCHING pushbutton is depressed (ARPO)?
[ FCOM-DSC-21-20-30 ]
º Avionics Inlet and Extract valves
º Ram air inlet
º Pack Flow Control valves
º Outflow valve (only if in AUTO mode)
º FWD cargo outlet isolation valve
2 | Will the DITCHING pushbutton always close the outflow valve? [ FCOM-DSC-21-20-40 ]
º Not if the outflow valve is under manual control
3 | Can the pilot control the outflow valve? [ FCOM-DSC-21-20-30 ]
º Yes, select MAN on the MODE SEL and use the MAN V/S CTL switch
4 | How many auto controllers are in the pressurization system? [ FCOM-DSC-21-20-30 ]
º 2, only one is used at a time and they swap roles after each landing
5 | How do you manually switch controllers? [ FCOM-DSC-21-20-40 ]
º Switch MODE SEL to MAN for 10 seconds, then back to AUTO
6 | What does an amber FAULT light in the MODE SEL pushbutton indicate? [ FCOM-DSC-21-20-40 ]
º Both automatic pressure controllers are faulty
7 | From what source does the pressurization system normally obtain landing elevation? [ FCOM-DSC-21-20-40 ]
º FMGC database
8 | If the FMGC database does not supply the landing elevation, how do you set the landing elevation?
[ FCOM-DSC-21-20-40 ]
º Manually by selecting landing elevation via the LDG ELEV knob.
9 | What protects the airframe from excessive cabin differential pressure? [ FCOM-DSC-21-20-20 ]
º 2 pressure relief valves (safety valves)
10 |How many outflow valve motors are installed? [ FCOM-DSC-21-20-20 ]
º 3 total. One for each CPC, and one for manual control.
11 |How would a pilot manually control the pressurization? [ FCOM-DSC-21-20-10 ]
º By selecting MAN on the MODE SEL pb and utilizing the MAN v/s CTL toggle switch.
12 |What flow rate is automatically selected when APU bleed air is in use or during single pack operation?
[ FCOM-DSC-21-10-50 ]
º HI
13 |If the engine bleed air in-flight is too low what will occur? [ FCOM-DSC-21-20-30 ]
º Engine speed is automatically increased to provide adequate bleed air pressure
14 |What would cause an amber FAULT light to illuminate in the PACK 1 and/or Pack 2 pushbutton (OOD)?
[ FCOM-DSC-21-10-50 ]
º Overheat - Pack outlet
º Overheat - Compressor outlet
º Discontinuity - Switch position disagreement with pack flow control valve
Note: FAULT light will be illuminated when no bleed air is supplied
15 |At what cabin differential pressure does the RAM AIR valve open? [ FCOM-DSC-21-10-20 ]
º 1 PSI ΔP or less
16 |What causes the Pack Flow Control valve to automatically close? [ FCOM-DSC-21-10-50 ]
º Upstream pressure below minimum
º Pack overheat
º Engine start sequence
º Engine FIRE pushbutton on the related side pressed
º DITCHING pushbutton is selected
17 |What does an amber FAULT light in the HOT AIR pushbutton indicate? [ FCOM-DSC-21-10-50 ]
º Duct overheat - the Hot Air and Trim Air valves close automatically
18 |How many Air Conditioning System Controllers are there & how many lanes do they have? [ FCOM-DSC-21-10-10 ]
º 2 Air Conditioning System Controllers
º Each Air Conditioning System Controller has 2 lanes – (Active/Standby)
19 |Describe how the Air Conditioning System Controllers regulate temperature? [ FCOM-DSC-21-10-30 ]
º Basic temperature regulation: Both packs produce the required outlet temperature determined by
the lowest demanded zone temperature
º Optimized temperature regulation: Hot air is added to the individual zones by the trim air valves to maintain the desired zone temperatures
20 |What occurs when an active lane of an Air Conditioning System Controller fails? [ FCOM-DSC-21-10-40 ]
º The second lane takes over
21 |What occurs when both lanes of an Air Conditioning System Controller (ACSC) fail? [ FCOM-DSC-21-10-40 ]
º The related pack is lost. The hot air pressure regulating valve and associated trim air valve(s) close
22 |How does the Air Conditioning System Controller configure its associated pack ram air inlet flap for takeoff and landing to avoid the ingestion of foreign matter? [ FCOM-DSC-21-10-30 ]
º Takeoff: Pack Ram Air Inlet Flap closes when takeoff power is set and the main landing gear struts are compressed. Reopens after main landing gear strut extension
º Landing: Pack Ram Air Inlet Flap closes as soon as the main landing gear struts are compressed and speed ≥ 70 knots. Opens 20 seconds after speed < 70 knots
23 |If an air cycle machine (ACM) fails, what occurs? [ FCOM-DSC-21-20-40 ]
º The affected pack will operate as a heat exchanger
24 |What effect will the engine start sequence have on the pack flow control valves? [ FCOM-DSC-21-10-20 ]
º The pack flow control valve will close automatically
25 |What does the CARGO HEAT HOT AIR amber FAULT light indicate? [ FCOM-DSC-21-40-30 ]
º Duct overheat
26 |What is the purpose of the CABIN FANS? [ FCOM-DSC-21-10-20 ]
º To re-circulate cabin air to the mixing chamber and then back to the cabin
27 |With BLOWER and EXTRACT pushbuttons in AUTO how does the system operate?
[ FCOM-DSC21-30-20, FCOM-DSC-21-30-60 ]
º Ground – system is normally in the OPEN configuration
º Flight – system is normally in the CLOSED configuration
º Intermediate – Closed configuration except small internal flap in Extract Valve is open
28 |With both BLOWER and EXTRACT pushbuttons in OVRD (smoke configuration) what are the positions of the INLET and EXTRACT valves? [ FCOM-DSC-21-30-20 ]
º INLET valve CLOSED
º EXTRACT valve OPEN
29 |What is the status of the Blower and Extract fans with the Blower and Extract valves in OVRD?
[ FCOM-DSC-21-30-20 ]
º BLOWER fan OFF
º EXTRACT fan ON
30 |When is air conditioning introduced into the avionics compartment? [ FCOM-DSC-21-30-20 ]
º Abnormal operation
º SMOKE configuration
31 |Is the skin heat exchanger ever bypassed in flight? [ FCOM-DSC-21-30-20 ]
º Yes; during SMOKE configuration
32 |What does an amber FAULT light on the BLOWER pushbutton indicate? [ FCOM-DSC-21-30-60 ]
º SMOKE warning is activated
º Computer power supply failure
º Low blower pressure
º Duct overheat
33 |What does an amber FAULT light on the EXTRACT pushbutton indicate? [ FCOM-DSC-21-30-60 ]
º SMOKE Warning is activated
º Computer power supply failure
º Low Extract pressure
34 |With 2 FAULT lights on the VENTILATION panel are there any other indications? [ FCOM-DSC-26-30-20 ]
º Yes – The SMOKE light in the GEN 1 LINE pushbutton
