Fire Detection and Protection

Question 1

What fire extinguishing agents are there?

Answer 1

1 APU
4 Engine
6 Lower cargo

Question 2

When are the Engine Fire Switches unlocked?

Answer 2

Fire Warning
Fuel Control switch in cutoff

Question 3

What happens when an engine fire switch is pulled?

Answer 3

Closes engine and spar valve
Closes bleed air valve
Trips off Engine generator
Shuts off hydraulic fluid
Depressurizes engine drive HYD pump
Arms related fire extinguishers

Question 4

What happens when the APU fire switch is pulled?

Answer 4

Closes APU fuel valve
Closes APU bleed valve
Closes air inlet door
Trips generator field and breaker
Arms bottle
Shuts down the APU

Question 5

What happens when the Cargo fire arm switch is pressed?

Answer 5

Turns off two packs
Arms lower cargo fire extinguishers
Configures equipment cooling to cut off airflow

Question 6

What happens when the lower Cargo fire arm switch is pressed?

Answer 6

Turns off two packs
Arms lower cargo fire extinguishers
Configures equipment cooling to cut off airflow
Closes master trim air valve

Question 7

What happens when the Main deck Cargo fire arm switch is pressed?

Answer 7

Enables Main deck depressurization
Turns off 2 packs
Configures equipment cooling to closed loop
Turns off all airflow to main deck
Turns off all airflow and heat to lower cargo

Question 8

With the Main Deck Fire Switch armed, what does pressing the CARGO FIRE DEPRESS/DICH switch do?

Answer 8

Initiates a controlled cab depressurization

Question 9

What does pressing the FIRE/OVHT TEST button do?

Answer 9

Fire bell rings
APU warning horn sounds
EICAS TEST IN PROG
Master WARNING, Engine fire light, APU fire, FWD and AFT cargo lights MAIN DECK lights, and fuel control lights illuminate

Question 10

T/F: Fire Extinguishing is provided for the APU, Engines, Cargo Compartments, and Lavatories.

Answer 10

True

Question 11

The Engine Fire Switches must be ____________ to arm the extinguisher bottle, and ___________ to discharge the bottle.

Answer 11

Pulled Out, rotated

Question 12

Which cargo compartment does not have fire protection?

Answer 12

Bulk Cargo

Question 13

What does EICAS CARGO DET AIR indicate?

Answer 13

The smoke detectors are not getting sufficient air flow

Question 14

For Lower cargo how do the 6 fire bottles function?

Answer 14

2 bottles discharge immediately and the 4 bottles discharges on a timed delay. Suppressing the fire up to 210 minutes

Question 15

When will the CARGO FIRE DEPRESS/ DISCH, DISCH light illuminate?

Answer 15

When the first two bottles begin to discharge

Question 16

When will the CARGO FIRE DEPRESS/ DISCH, DEPRESS light illuminate?

Answer 16

When the airplane begins to depressurize

Question 17

How many Loops does each detector have?

Answer 17

2

Question 18

How many Bottle Extinguishers are there for the 747-400F cargo compartments?

Answer 18

6

Question 19

How can the APU fire ground warning horn be cancelled?

Answer 19

Extinguishing the fire
Pushing master warning
Pulling the APU fire control switch in the wheel well

Question 20

How many Extinguisher Bottles are provided for APU Fire protection?

Answer 20

1

Question 21

T/F: If the Flight Deck APU Fire Switch Fails to unlock, the pilot can manually unlock it.

Answer 21

True

Question 22

How many Fire Detection Loops are there per engine?

Answer 22

2

Question 23

T/F: The Master Warning lights and bell may be reset by pressing the MW switches.

Answer 23

True