Fire Protection

Question 1

How many fire bottles are there for the engines?

Answer 1

2 bottles for each engine

Question 2

What happens when an ENG FIRE pushbutton is pressed?

Answer 2

Fuel, hydraulic, and bleed valves close; generator trips; fire squibs armed; FADEC deactivated

Question 3

How do you discharge an engine fire bottle?

Answer 3

Push the associated AGENT 1 or 2 button after pressing ENG FIRE pb

Question 4

How many fire bottles are there for the APU?

Answer 4

1 dedicated bottle

Question 5

What happens when the APU FIRE pushbutton is pressed?

Answer 5

APU shuts down; fuel, air, and bleed valves close; squib armed; external APU shutdown enabled

Question 6

What happens if an APU fire is detected on the ground with nobody in the cockpit?

Answer 6

APU auto shuts down and bottle automatically discharges

Question 7

Where are the APU and engine fire bottles located?

Answer 7

In the aft fuselage

Question 8

How many fire bottles are there for cargo smoke?

Answer 8

1 bottle that can be directed at either cargo compartment.

Question 9

What happens when a CARGO SMOKE DISCH button is pressed?

Answer 9

Bottle discharged into selected cargo compartment.

Question 10

Can both cargo compartments be protected simultaneously?

Answer 10

No — the bottle is used for a single compartment

Question 11

What does a CARGO SMOKE light indicate?

Answer 11

Smoke detected in the associated compartment

Question 12

What happens when a CARGO SMOKE pb is pressed?

Answer 12

Cargo isolation valves close; extraction fan stops; bottle armed for discharge

Question 13

How are the lavatories protected from fire?

Answer 13

Each has an automatic halon extinguisher in the waste bin

Question 14

Are cockpit and cabin handheld fire extinguishers Halon-based?

Answer 14

Yes — they are standard Halon extinguishers

Question 15

What happens to the ventilation system during avionics smoke?

Answer 15

Enters smoke configuration: fans adjust, overboard valve opens, and air routing changes

Question 16

Where are fire detection loops located?

Answer 16

Engines: dual loops; APU: dual loop; Cargo: particle sensors (dual loop) Lav: single sensor

Question 17

What causes a fire warning to be triggered?

Answer 17

Both loops detect fire or one loop fails and the other detects fire