Fire Protection

Question 1

How many fire loops for each engine and APU

Answer 1

2

Question 2

How many fire bottles for the engine and APU

Answer 2

2 for each engine, 1 for APU

Question 3

What will happen if both fire loops fail?
(Two possible scenarios)

Answer 3

If both fail within 5 seconds it will generate a fire warning
If both fail within a longer timespan you will only get a detector fault

Question 4

What happens when you push/release the eng fire button

Answer 4

Hyd valve closes
Generator de-energize
LP fuel valve closed
Eng bleed and pack valve closed
Cuts off fadec
Arms squib

Question 5

What happens when you push the APU fire pb

Answer 5

Turns off lp fuel valve,
Generator de-energ
Bleed valve closed, and xbleed closed
Arms squib

Question 6

What happens if a lavatory smoke detector detects smoke? (Indications]

Answer 6

Master warning in cockpit, warning to cabin crew

Question 7

Cargo smoke:
Number or bottles
Automatic Actions when smoke is detected

Answer 7

1 shared bottle (according to cbt, FCOM may differ)
Any vent fans, and isolation valves automatically shut off

Question 8

What happens if an APU fire is detected on the ground

Answer 8

Auto shutdown and release of fire bottle after 3 seconds

Question 9

What does a loss of the red disc outside the APU compartment signify

Answer 9

That the APU fire bottle has overpressurized, and vented away

Question 10

Which parts of the engine has fire detection

Answer 10

Pylon Nacelle
Engine core
Engine fan section

Question 11

How many fire detectors are installed in each cargo compartment

Answer 11

2 in fwd, 4 in aft