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FCOM/FCTM/MEL-CDL/MSS A320 > ATA 21 - Air Conditioning / Pressurization / Ventilation > Flashcards

ATA 21 - Air Conditioning / Pressurization / Ventilation Flashcards

1
Q

What are the consequences of the primary channel failure in the zone controller ? Of the secondary channel ? Of both ?

A

Primary Channel: secondary takes over. Pack 1 for cockpit and pack 2 for cabin. 24 °C each. Hot air valve closed
Secondary Channel: no backup available
Both: 20°C pack1 and 10°C pack 2

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2
Q

What are the conséquences of a pack controller, primary channel failure ? secondary channel failure ? Both ?

A

Primary: pack flow fixed at the current setting
Secondary: backup lost
Both: Pack outlet temperature is controlled to between 5 and 30 deg C by the anti-ice valve

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3
Q

Bleed air supplied from the APU (APU bleed valve open), which pack flow is automatically selected ?

A

High

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4
Q

When does normal cabin air pressurization occur?

A

During take off roll

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5
Q

When does normal depressurization is completed ?

A

1 min after landing

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6
Q

Max altitude for Ram Air ?

A

10 000ft

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7
Q

Cabin pressure limitation with ram air utilisation ? Outflow valve position ?

A

Cabin differential pressure 1psi max. Outflow valve open at 50% if in auto mode.

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8
Q

General description of Air conditioning system ?

A

Cf diagram

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9
Q

Temperature corresponding to temperature selector COLD, NORM, HOT ?

A

18, 24, 30 °C

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10
Q

Description of a Pack ?

A

Cf diagram

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11
Q

Pack controller closes valve when :

A
  • IGN / START ( closed until 2nd engine start or 30s)
  • ENG FIRE PB
  • DITCHING PB
  • no air / overheat / overpressure
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12
Q

When pack air intake and outlet valves close ?

A

At take off
At landing (until < 70 kt + 20s)

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13
Q

Pack controller primary channel failure consequences ?

A

Works on secondary channel
Not optimized, previous flow is frozen

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14
Q

Description of avionic ventilation system ?

A

Cf diagram

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15
Q

How many cabin pressure controller are they ?

A

2, cycle every landings

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16
Q

Maximum cabin rate of descent ?

A

750 ft /min

17
Q

Excess cabin altitude alarm at which altitude ?

A

9550 ft

18
Q

No smoke, seat belt, Exit lights automatically ON at which cabin altitude ?

A

11300ft

19
Q

Number of safety valves and max cabin pressure value ?

A

2 safety valves, 8,6psi

20
Q

CPC 1 has a back up independent power supply. True / False ?

A

True

21
Q

The lavatory/galley extract fan operates:
a.
Continuously when electrical power is available
b.
Only on the ground
c.
Only in flight

A

A

22
Q

If bleed air is being supplied by the APU or if one pack fails; pack flow will go to what rate?

A

High

23
Q

When either the BLOWER or EXTRACT switches are in OVRD; air from the air conditioning system is added to ventilation air. True or False ?

A

True

24
Q

What is the number of occupants below which you select Pack flow LO ? A318,A319, A320,A321

A

A321: 168 (ECON)
A320: 141
A319: 138
A318: -

25
Q

Following an ECAM CAB PRESS SYST 1 AMBER FAULT. SYSTEM 2 takes over automatically without crew action. True or False ?

A

True

26
Q

During landing run PACK AIR FLAPS open when speed is less than XX kts ?

A

70kts + 20s

27
Q

The cabin zone temperature sensors are ventilated by the air extracted by the lavatory and galleys extraction fans. True or False ?

A

True

28
Q

The outflow valve is powered by how much electric motors ?

A

3
2 for auto control
1 for manual control

29
Q

Consequence of a ACSC (Air Conditioning System Controllers) dual lane failure ? Of a single lane failure ?

A

Single Lane: none
Both : Pack lost and hot air reg press valve closes

30
Q

If Pack flow is selected to LO and it is unable to cool down at the desired temperature, what does it do ?

A

NORM

31
Q

In case the AC is equipped with Air System Controller (ASC) instead of zone + pack controllers, which ASC controls which zone ?

A

ASC1 = cockpit
ASC2= cabin

32
Q

If bleed flow is too weak to sustain pack demand for cabin temperature, zone controller ask for higher IDLE. True or False ?

A

True

33
Q

in case ECAM requires that during final app VS CTL …. FULL UP, at which altitude do you perfom the action ?

A

2500ft AAL

FCOM/FCTM/MEL-CDL/MSS A320 (27 decks)

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