Air Conditioning and Pressurization

Question 1

In the aircraft pressurization system, what does the Amber LO
^p light indicate?

Answer 1

The pressurization system cannot keep up with descent rate of
aircraft

Question 2

What would cause the blue RATE light on the overhead

pressurization panel to illuminate?

Answer 2

The cabin pressure rate knob is out of the NORM position

Question 3

What air conditioning malfunction could cause an amber pack

FAULT light?

Answer 3

A pack overheat or valve position disagreement with selected

switch position

Question 4

What are the different levels of Air Conditioning Pack flow?

Answer 4

Normal or ECON

Question 5

In the Air Conditioning System, what is the purpose of the

ECON pushbutton switch?

Answer 5

Reduces airflow inflight to 68% normal flow (both engines

operating) to increase fuel efficiency.

Question 6

What is the primary purpose of the Pack Valves in the Air

Conditioning system?

Answer 6

They function as both a shutoff valve and a flow control valve

Question 7

In the Air Conditioning System, what is the purpose of the

MAX COOL pushbutton switch?

Answer 7

Lowers the lower limit of the pack discharge temp

Question 8

On the overhead air conditioning panel, if the compartment

temp function is selected to CRT, what happens?

Answer 8

All compartment temperatures can be read on ECAM

Question 9

How many automatic cabin pressurization systems are

installed?

Answer 9

2 systems, one active and one in standby

Question 10

When does the pressurization system automatically switch

controllers?

Answer 10

At 2nd engine start or when active system fails

Question 11

In the Pressurization System, how many motors are installed

on each outflow valve?

Answer 11

Three, (Reg 1, Reg 2, manual)

Question 12

If one auto pressurization controller is deferred and the
remaining one fails, how would the crew control aircraft
pressurization?

Answer 12

Selecting the faulted controller OFF will force the

pressurization system into manual control

Question 13

In the Air Conditioning System, what is the purpose of the

RAM air?

Answer 13

Used to ventilate cockpit and cabin in case of dual pack failure

Question 14

In the aircraft pressurization system, what is the purpose of
the Safety valves?

Answer 14

Protect against over or under pressurization of the aircraft

Question 15

How many temperature zones are there in the Air

Conditioning System?

Answer 15

Four – Cockpit, FWD cabin, MID cabin, Aft cabin

Question 16

With both Air Conditioning packs operating, what is the pack

outlet temperature control priority?

Answer 16

If the Flt Deck demands coldest temp, it controls pack 1

Question 17

In the aircraft pressurization system, what automatically

occurs when both outflow valves are selected OFF?

Answer 17

Ditching mode is activated

Question 18

In the Air Conditioning system, how are the lower FWD and

AFT cargo compartments heated?

Answer 18

Indirectly heated by upper deck air, BULK cargo compartment

is directly heated

Question 19

When would the Vent Overboard Valve normally be fully

open?

Answer 19

On the ground, no engines running

Question 20

What occurs if the EXTRACT pushbutton on the VENT

overhead panel is pressed in-flight?

Answer 20

OVBD light illuminates white and Overboard Valve partially

opens, increasing the rate of ventilation

Question 21

What does the air conditioning system supply to the Bulk

Cargo Compartment?

Answer 21

Trim air plus air extracted from the main deck

Question 22

What three conditions will cause the residual pressure red

warning light to flash?

Answer 22

Cabin pressure is present, at least one engine is shut down and
the emergency evacuation slide is disarmed

Question 23

What is the purpose of the RAM air system?

Answer 23

Used to ventilate cockpit and cabin in case of dual pack failure

Question 24

What occurs if the VENT EXTRACT pushbutton is pressed inflight in response to a VENT EXTRACT LO FLOW ECAM
message?

Answer 24

OVBD illuminates white and the Overboard Valve partially

opens

Question 25

What is the primary function of the Precooler?

Answer 25

Controls temperature of the engine bleed air entering the

bleed air manifold

Question 26

Where can hot air for the air-conditioning system be supplied
from?

Answer 26

The engine(s), APU or a ground air cart

Question 27

When you select the MAN PRESS switch, how does it affect

the aircraft pressurization system?

Answer 27

The system is selected to manual, the V/S Switch becomes
active and the ECAM pressurization display and the Cabin High
Altitude warning are both lost

Question 28

In the Air Conditioning system, what supplies the air for the
Hot Air Manifold?

Answer 28

Hot compressed bleed air tapped off prior to the packs

Question 29

Where is the cold air from the Air Conditioning Packs sent?

Answer 29

Cold Air Manifold

Question 30

With only one Air Conditioning pack operating, what controls

that pack’s outlet temperature?

Answer 30

The operating pack outlet temp is controlled by whichever

zone (cockpit or main deck) that requires the coolest air

Question 31

In the air conditioning system, what is the function of the

Pack Temp MAN CTL selector?

Answer 31

Manual control of the Pack discharge temperature when MAN

is illuminated white in the Pack MODE SEL pushbutton

Question 32

During normal operation, what does the active pressurization

system control to maintain cabin pressurization?

Answer 32

Outflow valves

Question 33

In the Air Conditioning system, what component mixes air

from the Hot and Cold Air manifolds?

Answer 33

Trim Air valve