FCOM: 21 - Air conditioning & pressurisation

Question 1

What are the temperature limits that will trigger a pack to shut itself off?

Question 3

In single engine operations when might the APU bleed be available?

Question 4

With the loss of both FMGCs, how will the pressurisation system obtain the landing elevation?

Question 5

When losing CPC 1 and 2, how is the cabin altitude controlled?

Question 6

When using the MAN V/S what happens to the outflow valve when the toggle is selected up?

Question 7

What is the ram air used for?

Question 8

How may motors drive the outflow valve, and why?

Question 9

On take off, why does the pressurisation system slightly pressurise the cabin?

Question 10

What is the purpose of the residual pressure control unit?

Question 11

Can you briefly explain the open circuit configuration of the ventilation system when the aircraft is on the ground?

Question 12

What cabin altitude will trigger an ECAM warning?

Question 13

What are the zones in the air conditioning system?

Question 14

Where does the air for the packs originate?

Question 15

How many pack flow control valves are there?

Question 16

How many mixing units are there?

Question 17

What is the job of the ram air inlet?

Question 18

What is the job of the trim air valves?

Question 20

At what temperature does the AIR: PACK1(2) OVHT alert trigger?

Answer 20

Pack Compressor outlet temp rises above 260°C.
When selecting PACK OFF it will automatically select HI flow.

Question 21

List the unpressurised areas.

Answer 21

GRAT
Gear bays (nose, main)
Radome
Air conditioning bay
Tail come

01/11/24