Day 8 - Penu, Air Con & Ice/Rain

Question 1

BMC stands for?

Answer 1

Bleed Management Computer

Question 2

Pre-cooler cools air to what temp?

Answer 2

200 degrees C

Question 3

The BMC will always detect and indicate overheat, as well as automatic protection triggered by the BMC.

But will it indicate the lower limit being exceeded if wing anti icing is selected?

Answer 3

Yes

Question 4

How many BMCs are there?

Answer 4

2

Question 5

If 1 BMC fails, what warnings does the other BMC indicate?

Answer 5

Takes over monitoring of the bleed system to issue ECAM warning if necessary

Over pressure
Over temperature
Wing leak

Question 6

In an emergency where smoke is present or both packs fail, what can we do?

Answer 6

Press the RAM AIR pb to open the emergency ram air inlet.

Ventilates the cockpit and cabin smoke or ventilation if both packs fail

Question 7

Under normal operations, do the packs work independently or not?

What controls the packs operation?

Answer 7

Packs operate automatically and independently of each other

Controlled by signals coming from the pack controller or the Air Conditioning System Controller

Question 8

Which ACSC’s control which of the 3 aircraft temp zones?

Answer 8

ACSC 1 controls cockpit temp

ACSC 2 controls the 2 cabin zones

Question 9

On the ground, what will happen when a pack overheat is detected?

In flight, what will happen when a pack overheat is detected?

Answer 9

The pack flow control Valve will close automatically

In flight we must close it ourself

Question 10

When will the pack flow control valve automatically close?

Answer 10

During start
Overheat (on ground only)

Or Engine fire & Ditching pb pressed

Question 11

How is the pack control valve controlled?

Answer 11

From the AIR COND panel

Question 12

Pack flow control valve failure will be indicated on the ECAM how?

Answer 12

Two amber crosses

Question 13

How can you get fresh air into the cabin in the event of a dual pack failure?

What conditions must be met for its operation?

Answer 13

Emergency Ram Air Inlet

-Controlled by the RAM AIR pb on the AIR COND panel
- Opens ram air valve if ditching is not selected
- if delta P is equal to or greater than 1PSI, the check valve located downstream of the ram air door will not open, even if the ram air door has been selected open. Not airflow will then be supplied.

Question 14

What does CPC stand for?

How many?

Answer 14

Cabin Pressure Controller

2

Question 15

If we do not climb after takeoff, what mode does the pressurisation go into?

What does this mode mean?

Answer 15

Abort mode

It prevents the cabin altitude from climbing. Cabin pressure is set back to the takeoff altitude +0.1PSI

Question 16

Max rate of descent for de-pressurisation?

For pressurisation in takeoff mode, what rate of climb does the controller pre-pressurise the aircraft?

Answer 16

750ft/min. Target to be at LDG Airfield press. +0.1PSI shortly before landing

400ft/min

Question 17

When does the pressurisation gauge on the ECAM turn red?

Answer 17

At 9550ft cabin alt

Packs and/or pressurisation not working

Question 18

When does Delta P turn amber?

Answer 18

8.6 PSI

Question 19

When is rain repellant used?

Answer 19

Jet2 do not have rain repellant used.

But it would be moderate to heavy if we did

Question 20

What is the purpose of the two independent pneumatic safety valves?

Answer 20

They prevent cabin pressure from going too high (8.6 PSI above ambient) or too low (1 PSI below ambient).

Question 21

What are the three sources of high pressure air for the pneumatic system?

Answer 21

Engine bleed systems, APU load compressor, HP ground connection.

Question 22

What are the consequences of a Bleed Management Computer failure?

Answer 22

The adjacent BMC takes over monitoring functions. The associated FAULT light on the AIR COND panel is lost and the associated bleed valve does not close automatically.

Question 23

With the X-BLEED selector switch in AUTO, when will the cross bleed valve close?

Answer 23

If the APU bleed valve is closed, or in case of a wing. pylon or APU leak (except during engine start)

Question 24

What is the purpose of the Emergency Ram Air inlet in the air conditioning system?

Answer 24

It ventilates the cockpit and cabin to remove smoke, or if both packs fail.

Question 25

What is the consequence of a single lane failure within an air conditioning system controller?

Answer 25

There is no effect as the second lane takes over.

Question 26

How is cabin altitude controlled when the pressure system is in manual mode?

Answer 26

The flight crew controls cabin altitude via the manual motor of the outflow valves, by operating controls on the CABIN PRESS control panel.

Question 27

Hot air is used to heat critical areas of the aircraft for anti-ice protection. What are those areas?

Answer 27

The three outboard leading edge slats of each wing, and the engine air intakes.

Question 28

What would be indicated by an amber FAULT light illuminated on the ENG 1(2) ANTI ICE pb-sw (not while the valve is transiting)?

Answer 28

The position of the anti-ice valve disagrees with the ENG 1(2) pushbutton selection

Question 29

Pneumatic system supplies air for what?

Answer 29

Air conditioning
Engine starting
Wing anti-icing
Water system pressurisation
Hydraulic reservoir pressurisation
AFT/FWD cargo heating (if installed)

Question 30

The engine bleed valve open if…?

Answer 30

Bleed pressure greater than 8 PSI
APU bleed valve closed
No faults
Eng fire pb switch in
Engine start valve closed

Question 31

Engine bleed temp is measured where?

Answer 31

Precooler outlet