Air cond/Press/Ventilation

Question 1

Which valves will receive a close command when the DITCHING PB is depressed?

Answer 1

Avionics Inlet and Extract Valves
Ram Air inlet
Pack flow control valve
Outflow valve (if in auto)
FWD cargo outlet isolation valve

Question 2

Will the DITCHING PB always close the outflow valve?

Answer 2

Not if its in manual mode

Question 3

Can the pilot control the outflow valve?

Answer 3

Yes, select MAN on the MODE SEL and use the MAN V/S CTL switch

Question 4

How many auto controllers are in the pressurization system?

Answer 4

2. Only 1 is used at a time and they switch after each landing

Question 5

How do you manually switch controllers?

Answer 5

Switch MODE SEL to MAN for 10 seconds and then back to AUTO

Question 6

What does an amber FAULT light in the MODE SEL pb indicate?

Answer 6

Both pressure controllers are faulty

Question 7

From what source does the pressurization system normally obtain landing elevation?

Answer 7

FMGC database

Question 8

If the FMGC database does not supply the landing elevation, how do you set it?

Answer 8

Manually by selecting the landing elevation via the LDG ELEV knob

Question 9

What protects the airframe from excessive cabin differential pressure?

Answer 9

2 Pressure relief valves (safety valves)

Question 10

How many outflow valve motors are installed?

Answer 10

3
1 for each CPC and 1 for manual control

Question 11

How would a pilot manually control the pressurization?

Answer 11

By selecting MAN on the MODE SEL pb and utilizing the MAN V/S CTL toggle switch

Question 12

What flow rate is automatically selected when the APU bleed air is in use or single pack operation?

Answer 12

HI

Question 13

If the engine bleed air in flight is too low, what will occur?

Answer 13

Engine speed is automatically increased to provide adequate bleed air pressure

Question 14

What would cause an amber FAULT light to illuminate in the PACK 1 or PACK 2 PB?

Answer 14

Overheat- Pack outlet
Overheat- Compressor outlet
Discontinuity- Switch position disagreement with pack flow control valve

(NOTE: FAULT light will be illuminated when no bleed air is supplied)

Question 15

At what cabin differential pressure does the RAM AIR valve open?

Answer 15

1 PSI or less

Question 16

What causes the Pack Flow Control Valve to automatically close?

Answer 16

Upstream pressure below min
Pack overheat
Engine start sequence
Engine FIRE PB on the related side is pressed
DITCHING PB is selected

Question 17

What does an amber fault light in the HOT AIR PB indicate?

Answer 17

Duct Overheat
(The Hot air and Trim Air Valves close automatically)

Question 18

How many Air Conditioning System controllers (ACSC) are there and how many lanes do they have?

Answer 18

2 Air Conditioning System controllers
Each controller has 2 lanes (Active and Standby)

Question 19

How do the Air Conditioning System Controllers regulate temperature?

Answer 19

Both packs produce the required outlet temp determined by the lowest demanded zone temp

Hot air is added to the individual zones by the trim air valves to maintain the desired zone temp

Question 20

What occurs when an active lane of an air conditioning system controller fails?

Answer 20

The second lane takes over

Question 21

What occurs when both lanes of an air conditioning system controller fail?

Answer 21

The related pack is lost. The hot air and trim air valves close.

Question 22

How does the air conditioning system controller configure its associated pack ram air inlet flap for take off and landing to avoid the ingestion of foreign matter?

Answer 22

Takeoff: Pack ram air inlet flap closes when takeoff power is set AND the main landing gear struts are compressed. It reopens after the main landing gear strut extension

Landing: Pack ram air inlet flap opens as soon as the main landing gear struts are compressed and speed is less than 70kts. Opens 20 seconds after speed is greater than 70kts.

Question 23

If an air cycle machine (ACM) fails, what occurs?

Answer 23

The affected pack will operate as a heat exchanger

Question 24

What effect will the engine start sequence have on the pack flow control valves?

Answer 24

The pack flow controls valves will close automatically

Question 25

What does the CARGO HEAT HOT AIR amber FAULT light indicate?

Answer 25

Duct Overheat

Question 26

What is the purpose of the CABIN FANS?

Answer 26

To re-circulate cabin air to the mixing chamber and back to the cabin

Question 27

With the BLOWER and EXTRACT pbs in AUTO, how does the system operate?

Answer 27

Ground- System is OPEN
Flight- System is CLOSED
Intermediate- CLOSED config except the small internal flap in the extract valve is OPEN

Question 28

With the BLOWER and EXTRACT pbs in OVRD (smoke config), what are the positions of the INLET and EXTRACT valves?

Answer 28

INLET is CLOSED
EXTRACT is OPEN

Question 29

What is the status of the Blower and Extract fans with the Blower and Extract valves in OVRD?

Answer 29

Blower fan is OFF
Extract fan is ON

Question 30

When is air conditioning introduced into the avionics compartment?

Answer 30

Abnormal Operation
Smoke Configuration

Question 31

Is the skin heat exchanger ever bypassed in flight?

Answer 31

Yes during smoke config

Question 32

What does an amber FAULT light on the BLOWER pb indicate?

Answer 32

SMOKE warning activated
Computer power supply failure
Low Blower pressure
Duct overheat

Question 33

What does an amber FAULT light on the EXTRACT pb indicate?

Answer 33

SMOKE warning activated
Computer power supply failure
Low extract pressure

Question 34

With 2 FAULT lights on the VENTILATION panel, are there any other indications?

Answer 34

Yes- SMOKE light in the GEN 1 LINE PB