A320 Lounge Fire

Question 1

Where do we have fire detection and extinguishing?

Answer 1

Engine and APU

Question 2

Where are the fire detection loops?

Answer 2

Engine pylon
Nacelle
Core

For APU and for engine

Question 3

What is the logic of the fire detection loops?

Answer 3

If both of them detect high temperature

Or if one failed and other one detects high temperature

Or both loops fail within 5 seconds of each other

Then FWC detects a fire in that area, generating master warning

Question 4

How are fire detection loops powered?

Answer 4

DC busses
ENG 1 loop A - DC ESS
ENG 1 loop B - DC 2

ENG 2 loop A - DC 2
ENG 2 loop B - DC ESS

APU loop A - DC BAT BUS
APU loop B - DC BAT BUS

Question 5

Which fire detection loops are powered by DC ESS BUS?

Answer 5

ENG 1 loop A
ENG 2 loop B

Question 6

Which fire detection loops are powered by DC BUS 2?

Answer 6

ENG 1 loop B
ENG 2 loop A

Question 7

Which fire detection loops are powered by DC BAT BUS?

Answer 7

APU loop A
APU loop B

Question 8

Which DC BUS powers fire detection for ENG 1 loop A?

Answer 8

DC ESS BUS

Question 9

Which DC BUS powers fire detection for ENG 1 loop B?

Answer 9

DC 2 BUS

Question 10

Which DC BUS powers fire detection for ENG 2 loop A?

Answer 10

DC 2 BUS

Question 11

Which DC BUS powers fire detection for ENG 2 loop B?

Answer 11

DC ESS BUS

Question 12

Which DC BUS powers fire detection for APU loop A?

Answer 12

DC BAT BUS

Question 13

Which DC BUS powers fire detection for APU loop B?

Answer 13

DC BAT BUS

Question 14

How many bottles of extinguishing agent are there per engine, and how many squibs?

Answer 14

2 bottles per engine, and each has 2 squibs

Question 15

What happens when you press AGENT 1?

Answer 15

It fires both squib A and squib B for bottle 1

Question 16

In EMER ELEC config, how many extinguishing bottles are available? Why?

Answer 16

Only 1 bottle, which is bottle 1. This is because both squibs in bottle 2 are powered by DC BUS 2

Question 17

In engine fire extinguishing, what is squib A for bottle 1 powered by?

Answer 17

BAT 1 HOT BUS

Question 18

In engine fire extinguishing, what is squib B for bottle 1 powered by?

Answer 18

BAT 2 HOT BUS

Question 19

In engine fire extinguishing, what is squib A for bottle 2 powered by?

Answer 19

DC 2 BUS

Question 20

In engine fire extinguishing, what is squib B for bottle 2 powered by?

Answer 20

DC 2 BUS

Question 21

In APU fire extinguishing, what is squib A for bottle 1 powered by?

Answer 21

BAT 1 HOT BUS

Question 22

In APU fire extinguishing, what is squib B for bottle 1 powered by?

Answer 22

DC BAT BUS

Question 23

In APU fire extinguishing, what is squib A for bottle 2 powered by?

Answer 23

Trick question - APU has only 1 bottle

Question 24

How are the squibs armed?

Answer 24

By pushing the engine fire push button

Question 25

Why do we check for the red dot on the APU during the walkaround?

Answer 25

To check that the APU hasn't autoextinguished

Question 26

What do you need for APU autoextinguishing?

Answer 26

DC BAT BUS has to be energised