Review Questions - Fire Protection

Question 1

Where are the engine fire loops installed?

Answer 1

Pylon nacelle

Engine core

Fan section

Question 2

What happens if both fire loops fail?

Answer 2

If the failure of both loops occurs within 5 seconds of each other, a FIRE warning will be issued.

Question 3

What does an amber DISCH light on the FIRE panel mean?

Answer 3

The fire extinguisher bottle has lost its pressure.

Question 4

How many fire extinguishers are provided for each engine?

Answer 4

2

Question 5

List the actions that occur when an ENGINE FIRE pushbutton is pressed.

Answer 5

• 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
• Deactivated the IDG

Question 6

What occurs when you press the ENG 1(2) TEST pushbutton on the FIRE panel?

Answer 6

• CRC sounds (when AC pwr avail)
• The MASTER WARN lights flash (when AC pwr avail)
• ENG FIRE warning appears on ECAM (when AC pwr avail)
• The FIRE lights on the ENG MASTER panel (pedestal) come on red
• On the fire panel:
  
  • the ENG FIRE pushbutton lights up red
  • the SQUIB lights come on white if discharge supplies are available
  • the DISCH lights come on amber

Question 7

How many fire extinguishers are provided for the APU?

Answer 7

1

Question 8

List the actions that occur when the APU FIRE pushbutton is pressed

Answer 8

• shuts down the APU
• silences the aural warning
• arms the squib on the APU fire extinguisher
• closes the low pressure fuel valve
• shuts off the APU fuel pump
• closes the APU bleed valve and X bleed valve and deactivates the APU generator

Question 9

What occurs when you press the APU TEST pushbutton on the FIRE panel?

Answer 9

• CRC sounds (when AC pwr available)
• the MASTER WARN lights flash (when AC pwr available)
• APU FIRE warning appears on ECAM (when AC pwr available)
• on the fire panel:
  
  • the APU FIRE pushbutton lights up red
  • the SQUIB light comes on white if discharge supplies are available
  • the DISCH light comes on amber

NOTE: Automatic shutdown of the APU on the ground may occcur if pressed and held in for more than 3 seconds

Question 10

Does the APU fire extinguisher automatically discharge if a fire is detected on the ground?

Answer 10

Yes. The APU will automatically shut down and the APU fire extinguisher will discharge

Question 11

Does the APU fire extinguisher automatically discharge if a fire is detected in flight?

Answer 11

No

Question 12

How many fire extinguishers are provided for the cargo compartments on the A320? A321?

Answer 12

A320:

1 bottle, which can be discharged to either compartment

A321:

2 bottles, which can be discharged to either compartment. 205 min discharge requirement for ETOPS (ETOPS certified aircraft)

Question 13

On the CARGO SMOKE panel, what does the red SMOKE light in the FWD or AFT pushbutton indicate?

Answer 13

a. Both channels detect smoke, or
b. One channel detects smoke and the other channel is faulty

Question 14

How many cargo smoke detectors are there?

Answer 14

A320:

• 2 forward cargo
• 4 aft cargo

A321:

• 4 forward cargo
• 6 aft cargo

Question 15

With a CARGO SMOKE warning what happens to the Isolation Valve and Extract Fan?

Answer 15

Isolation Valve closes

Extract Fan stops