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A320-AirCond&Pressurization > FCOM > Flashcards

FCOM Flashcards

1
Q

Temperature Regulation is controlled by

A

Zone controller and two pack controller

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2
Q

Pack Operation is controlled by

A

Pack controller signal

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3
Q

Pack Flow Control Valve

A

is pneumatically-operated and electrically-controlled

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4
Q

How pack flow control valve regulates the air flow?

A

In accordance with signal received from pack controller

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5
Q

The pack flow control valve closes automatically in case of

A

pack overheating, engine starting, fire or ditching pushbutton

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6
Q

What RAM AIR does?

A

ventilates the cockpit and cabin to remove smoke , or if both pack fails

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7
Q

When RAM AIR pb is ON:

A

The outflow valve opens about 50% provided that it is under automatic control and P is less than one PSI

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8
Q

Hot-Air Pressure-Regulating Valve

A

is pneumatically-operated and electrically-controlled

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9
Q

Hot-Air pressure regulative valve closes automatically in case of

A
  • The Duct overheats
  • The cockpit trim air valve fails
  • Both cabin trim air valves fail
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10
Q

Trim air valves are

A

electrically-controlled by the zone controller

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11
Q

how pack controller regulates the temperaturee

A

Each pack controller regulates the temperature of its associated pack, in accordance with a demand signal from the zone controller,by modulating the bypass valve and the ram air inlet flaps

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12
Q

When ram air inlet flaps close during TO

A

when TO power is set

main landing gear struts are compressed

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13
Q

When ram air inlet flaps closes during Landing

A

as soon as main landing gear struts are compressed,

as long as speed is at or above 70knots

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14
Q

When ram air inlet flaps open after landing

A

They open 20 seconds after the speed drops below 70 knots

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15
Q

When pack flow controller delivers high flow?

A
  • in single pack operation

- when the APU is supplying bleed air

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16
Q

What is EIU

A

Engine Interface Units

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17
Q

Where are the temperature sensors

A
  • in the cockpit, for the cockpit zone

- in the lavatory extraction circuit and galley ventilation system for the cabin

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18
Q

The Temperature selection range is

A

18’C to 30’C, middle 24’C

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19
Q

Zone Controller Primary channel fails

A

The flow setting function and optimized temperature regulation are not available
Hot AIR and TRIM AIR valve closes
The zones are controlled to 24’C
Pack1 controls the cockpit temp
Pack2 controls the FWD and AFT cabin temp
ALTN MODE appears on the ECAM COND page

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20
Q

Zone Controller Secondary Channel Fails

A

This has no effect on zone temperature regulation

Backup mode is lost

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21
Q

Zone Controller Primary and Secondary channel fails

A

Optimized and backup temperature regulation is lost
The pack deliver a fixed temp
20’C for Pack 1
10’C for Pack 2
The fialure removes all information from the ECAM COND page, which then displays PACK REG

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22
Q

Pack Controller Primary Channel Fails

A

The secondary computer operates as a backup
Regulation is not optimized
Pack flow is fixed at the previous setting

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23
Q

Pack Controller Secondary Channel Fails

A

This failure has no effect on pack regulation
Backup mode is lost
ECAM signals related to the corresponding pack are lost

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24
Q

Pack Controller Primary and Secondary channel fails

A

As a backup, corresponding pack outlet temperature is controlled by the ANTI-ICE valve
Temperature between 5’C and 30’C in a maximum of 6 minutes

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25
What is ACM
Air Cycle Machine
26
HOT AIR pressure regulating valve failure
Failed Open: no Effect Failed Closed: optimized regulation is lost, Trim air valves are driven to the full closed position. Pack 1 controls the cockpit temperature to the selected value Pack 2 controls the cabin temperature to the mean value
27
TRIM AIR valve failure
Optimized temperature regulation of the corresponding zone is lost
28
HOT AIR pb FAULT light will come if
the duct temperature reaches 88'C the Valve and trim air valve closes automatically The FAULT light goes off when the temperature drops below 70'C and the flight crew selects OFF
29
Pack flow control valve automatically opens except
- Upstream pressure below minimum - Compressor outlet overheat - Engine start sequence - The fire pb of the engine on the related side is pressed - Ditching is selected
30
Pack Outlet Temperature appears in amber if
the temperature is higher than 90'C
31
Pack Compressor outlet temperature appears in amber if
the temperature is higher than 230'C
32
Zone Duct temperature appears in amber if
temperature at 80'C
33
The pressurization system consist of
- Two Cabin Pressure Controller (CPC) - One outflow valve - One control panel - Two safety valves
34
CPC receive information from
ADIRS(Air Data Inertial Reference System) FMGC(Flight Management and Guidance Computer) EIU(Engine Interface Unit) LGCIU(Landing Gear Control Interface Unit)
35
Where is the outflow valve located?
The outflow valve is on the right hand side of fuselage,behind the aft cargo compartment and below the flotation line
36
How Safety Valves operate?
Two independent pneumatic safety valves prevent cabin pressure from going to high (8.6 psi above ambient) or too low (1 psi below ambient)
37
Where are Safety Valves located?
on the rear pressure bulkhead, above the flotation line
38
When automatic transfer occur in CPC?
- 70 seconds after each landing | - if the operating system fails
39
What is maximum cabin pressure?
8000 feet
40
CPC gets landing elevation and QNH from
FMGC | if not available uses captain Baro Reference form the ADIRS and the LDG ELEV selection
41
CPC gets pressure altitude
ADIRS
42
To avoid a pressure surge at rotation, the controller pre-pressurize the aircraft at rate of
400 feet/min, until P reaches 0.1 psi
43
The maximum cabin descent rate is
750 feet/minute
44
DITCHING pb is pressed closed valves are?
1. Outflow valve 2. Emergency ram air inlet 3. Avionics ventilation inlet and extract valves 4. Pack flow control valves
45
MAN V/S CTL toggle switch
UP: the valve moves toward the open position Down:the valve moves toward the closed position
46
V/S FT/MIN appear in amber
When V/S >= 2000 feet/min
47
V/S FT/MIN digital presentation pulses
When V/S > 1800 reset at 1600 feet/min
48
Delta P PSI appear in amber
when dP <= 0.4 or >= 8.5 psi
49
Delta P PSI digital presentation pulses if
dP >1.5 reset at 1 psi during flight phase 7
50
CAB ALT FT appear in red if
the cabin altitude goes above 9500 feet
51
CAB ALT FT digital presentation pulses if
the cabin altitude >= 8800 feet resets at 8600 feet
52
When does the safety valve opens?
the cabin differential pressure is between 8.2 and 8.9 psi
53
Outflow valve position becomes amber when
the valve opens more than 95% during flight
54
What is the meaning of AVEC?
Avionic Equipment Ventilation Controller
55
The Ventilation system includes ventilation for
1. Avionics 2. Battery 3. Lavatories and Galleys
56
Open-circuit configuration operates in GROUND when
the skin temperature is ABOVE the on-ground threshold | +12'C increasing or +9'C decreasing
57
Closed-circuit configuration operates in Ground when
the skin temperature is BENEATH the on-ground threshold: | +12'C increasing or +9'C decreasing
58
Closed-circuit configuration operates in Flight when
the skin temperature is BENEATH the in flight threshold | +35'C increasing or +32'C decreasing
59
Intermediate configuration operates in Flight when
the skin temperature is ABOVE the in flight threshold | +35'C increasing or +32'C decreasing
60
What happen if BLOWER or the EXTRACT pb switch is set at the OVRD position
the system is in closed-circuit configuration and adds air from the air conditioning system to the ventilation air
61
What happen if BLOWER pb switch is set at the OVRD position
The blower fan is stopped and the extract fan continues to run
62
What happen if EXTRACT pb switch is set at the OVRD position
The extract fan is controlled directly from the push button, BOTH fans continue to run
63
How battery ventilation works?
A venturi in the skin of the aircraft draws air from the space around the batteries and vent it overboard.
64
How lavatory and galley ventilation works?
An extraction fan draws ambient cabin air through the lavatories and galleys and exhausts it near the outflow valve.
65
The cargo pressure regulating valve is
Pneumatically operated and electrically controlled
66
if the inlet temperature exceeds 70'C
the controller closes the trim air valve
67
if the inlet temperature exceeds 88'C
the controller interprets this as a duct overheat and closes the pressure regulating valve
68
AFT Cargo heat temperature Selector positions are
COLD = 5'C HOT= 26'C MIDDLE=15'C

A320-AirCond&Pressurization (3 decks)

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