Fire Protection

Question 1

How many loops?
Where are the 3 engine elements?

Answer 1

Loop A + B in parallel
Nacelle, core, fan
One element in APU compartment

Question 2

How many bottles in the Engine / APU / Cargo bay?

Answer 2

Two in engine, dual electric supply
Two in APU
One in cargo, two heads, three nozzles (1 fwd, 2 aft)

Question 3

What is the fire detection logic in loops A+B?

Answer 3

Both must detect unless one is failed
If both break within 5 sec

Question 4

What does the ENG FIRE pb do?
What does it close / turn off?

Answer 4

Arms the squib
Silences warning
Closes
* LP fuel
* HYD SOV
* Bleed valve
* Pack Flow valve
* FADEC power
* IDG

Question 5

What does the APU FIRE pb do?
What does it close / turn off?

Answer 5

Arms squib
Silences warning
Closes
* LP fuel valve
* APU fuel pump
* APU bleed
* APU generator
* Cross bleed

Discharges bottle 3 sec after fire warning

Question 6

APU Shut Off pb on ground panel does what?

Answer 6

Same as automatic shut down but no cooling cycle

Question 7

What lights come on if avionics smoke?

Answer 7

BLOWER + EXTRACT: FAULT
GEN 1 LINE: SMOKE

Question 8

Cargo smoke: how many loops, how many detectors?

Answer 8

Dual loop
Two detectors forward, four detectors aft
One extinguisher with two heads (for each compartment)
* One outlet fwd, two aft