Fire Protection

Question 1

What areas have fire extinguishing protection?

Answer 1

• cargo compartments
• engines
• APU
• lavatories
• cockpit and cabin via portable extinguishers

Question 2

How many fire sensing elements on the aircraft?

Answer 2

‐ Three or four (as installed) engine fire sensing elements, in the pylon nacelle, in the engine core, and in the engine fan section

‐ One fire sensing element in the APU compartment

Question 3

How many fire extinguishing bottles?

Answer 3

• 4 engine bottles (2 per engine)
• 1 APU bottle
• 1 or 2 cargo compartment bottles

Question 4

What happens when ENG 1(2) FIRE pb is pressed?

Answer 4

‐ 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 the FADEC power supply 
‐ Deactivates the IDG

Question 5

When the APU FIRE pb is pressed

Answer 5

‐ 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
- deactivate the APU gen

Question 6

What happens when Smoke is detected in the avionics?

Answer 6

When smoke is detected for more than 5 s:
‐ The Single Chime (SC) sounds
‐ The MASTER CAUTION lights flash
‐ The ECAM AVIONICS SMOKE alert triggers
‐ SMOKE light of the GEN 1 LINE pb-sw comes on
‐ FAULT lights of the BLOWER pb-sw and the EXTRACT pb-sw come on

Question 7

How many smoke detectors in the cargo compartments?

Answer 7

• Two smoke detectors that are in the forward cargo compartment ceiling panel
• Four smoke detectors that are in the aft cargo compartment ceiling panel

Question 8

When is the 2nd bottle discharge in the cargo compartment?

Answer 8

• 60 min after the discharge of AGENT 1, the DISCH AGENT 2 light comes on to indicate that the flight crew has to discharge AGENT 2
• A flow metering system controls the discharge of bottle 2 over 90 mins

Question 9

How is SMOKE detected in the Avionics Bay?

Answer 9

Via one smoke detector in the extraction duct of the avionics ventilation system