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Command Preparation > 26 Fire Protection > Flashcards

26 Fire Protection Flashcards

1
Q

Which areas of the aircraft have smoke detection?

A

Cargo compartments
Lavatories
Avionics bay

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2
Q

Which areas of the aircraft have fire extinguishing?

A

Cargo compartments
Engines
APU
Lavatories

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3
Q

How many fire detection loops are there in the engines? What about the APU?

A

Two identical loops (A and B) mounted in both engines and in the APU

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4
Q

How many fire sensing elements are there in each of the two fire detection loops in the engines? Where are they?

A

Three or four (as installed)

Pylon
Nacelles
Engine Core
Engine Fan

FCOM 26-20-10

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5
Q

How many fire sensing elements are there in each of the two fire detection loops in the APU?

A

One in the APU compartment

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6
Q

How many fire extinguishing bottles are there in the engines and in the APU?

A

Two in each engine

One in the APU

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7
Q

When does a fire warning appear in the flight deck?

A

If both A and B loops send a fire signal, or
One loops sends a fire signal and the other is failed, or
Breaks in both loops occur within 5s of each other (flame effect), or
A test is performed on the FIRE panel

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8
Q

When does a fire loop-fault caution appear in the flight deck?

A

One loop is failed, or
Both loops have failed, or
The Fire Detection Unit (FDU) fails

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9
Q

What is an FDU?

A

Fire Detection Unit

It makes up part of the fire and overheat detection system, along with loops A and B

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10
Q

What are the 8 things that happen when the flight crew pushes the ENG 1(2) FIRE push button?

A 
Silences the aural fire warning
Arms the fire extinguisher squibs
Closes the low-pressure fuel valve
Closes the hydraulic fire shut off valve
Closes the engine bleed valve
Closes the pack flow control valve
Cuts off FADEC power supply
Deactivates the Integrated Drive Generator (IDG)
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11
Q

Describe what happens if an APU fire is detected on the ground

A

The APU initiates an automatic shutdown sequence:

  • APU low pressure fuel shutoff valve closes
  • ECB receives a signal that starts the shutdown sequence
  • The extinguisher bottle discharges automatically (3 seconds after the appearance of the fire warning)
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12
Q

How long does smoke have to be detected for before a single chime and a MASTER CAUTION on the flight deck?

A

More than 5 seconds

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13
Q

Where is the smoke detector fitted in the avionics bay?

A

In the air extraction duct of the avionics ventilation system

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14
Q

Where is the smoke detector fitted in the lavatories?

A

In the air extraction duct of the lavatory

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15
Q

What happens if there is a fire in the lavatory waste bin?

A

Each lavatory wastebin has an automatic fire extinguishing system

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16
Q

How many smoke detectors are fitted in the forward and aft cargo compartments of an A319 and A320? Where are they located?

A

2 in the forward cargo compartment
4 in the aft cargo compartment

They are located in the ceiling panel cavities

The smoke detectors are linked to one of the two detection loops

FCOM 26-50-10

17
Q

How many smoke detectors are fitted in the forward and aft cargo compartments of an A321? Where are they located?

A

4 in the forward cargo compartment
6 in the aft cargo compartment

They are located in the ceiling panel cavities

The smoke detectors are linked to one of the two detection loops

FCOM 26-50-10

18
Q

When does smoke in a cargo compartment activate the cargo smoke warning?

A

If both smoke detectors detect smoke, or

If one smoke detectors detects smoke and the other is inoperative

19
Q

How many fire bottles are used for the cargo compartment fire extinguishing system?

A

One

20
Q

How many discharge heads are there on the cargo compartment fire extinguishing bottle?

A

Two (which then supplies three nozzles, one for forward and two for aft compartment)

21
Q

How many nozzles are connected to the cargo compartment fire extinguishing bottle?

A

Three (connected to two discharge heads)

One nozzle is in the forward compartment, two nozzles are in the aft compartment

FCOM 26-50-10

22
Q

Will the ENG and APU FIRE push buttons extinguish when a fire is no longer detected?

A

Yes

23
Q

Will the CARGO SMOKE push buttons extinguish when a fire is no longer detected?

A

No (the DISCH light comes on in amber when the bottle is empty)

Command Preparation (31 decks)

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