Fire Protection/Detection

Question 1

AUDIO

Answer 1

AUDIO

Question 2

What unlocks fire switch?

Answer 2

• Fire Warning - Fuel Control switch to CUTOFF - Pushing Fire Override Switch

Question 3

How many fire bottles for engines?

Answer 3

2 on each wing

Question 4

What happens when engine fire switch pulled out?

Answer 4

• HYD Fluid to EDHP shut off and EDHP depressurized - Eng Spar Valves close - Eng Bleed Valve closes - Arms Extinguishers - Trips ENG GEN

Question 5

How many APU fire bottles?

Answer 5

One

Question 6

How is APU shut down from exterior?

Answer 6

APU stop switch on APU ground panel located on right body gear well.

Question 7

When will APU fire extinguisher automatically activate?

Answer 7

For fire warning light on the ground

Question 8

What condition must be satisfied for an engine fire warning?

Answer 8

Both loops must detect a fire to cause warning.

Question 9

Each has engine how many loops?

Answer 9

2 overheat 2 fire detector

Question 10

Is there overheat detection loop for APU?

Answer 10

No, only dual loop fire detection

Question 11

Do both loops have to detect fire for APU fire?

Answer 11

No, only one

Question 12

How many detectors installed for lower cargo compartments?

Answer 12

4 dual loop detectors

Question 13

How many detectors installed on main deck?

Answer 13

16 dual loop detectors

Question 14

How do cargo detection systems work?

Answer 14

Sample air drawn through detectors by center bleed duct air.

Question 15

Do both loops have to detect smoke to activate cargo fire warning?

Answer 15

Yes

Question 16

What happens if a fault occurs in one loop of ANY fire/overheat test?

Answer 16

• System reconfigures for single loop operation - Operable loop will trigger condition

Question 17

What fire detection system is provided for wheel wells?

Answer 17

Each main gear well has single loop FIRE detector EICAS: FIRE WHEEL WELL

Question 18

What FP/FD is provided for crew rest area?

Answer 18

Smoke detectors that activate aural warning

Question 19

Lav FP/FD system?

Answer 19

Smoke detector w/aural warning and auto extinguisher in trash.

Question 20

What happens if APU FIRE Switch pulled out?

Answer 20

• Shuts down APU - Trips APU GEN - Arms Extinguisher - Closes APU Fuel Valve - Closes APU Bleed Air Valve - Closed Inlet Door

Question 21

How many bottles are available for the Lower Lobes and how do they deploy?

Answer 21

4 TOTAL - Two deploy immediately - Two deploy after a short delay or upon touchdown (for 210 minutes)

Question 22

How is detection system tested?

Answer 22

ENG DET are continuously monitored. All duel loop detectors are tested on initial power up. * no single loop wheel well test on power up

Question 23

What happens when MAIN DECK CARGO FIRE Switch is ARMED?

Answer 23

• Enabled fire suppression system - Turns OFF 2 packs - Configs equip cooling to closed loop - Turns off all airflow to BOTH MAIN + AFT LLCs - Closes master trim air valve

Question 24

What happens when FWD or AFT DECK CARGO FIRE Switch is ARMED?

Answer 24

• Arms LLC fire extinguishers - Turns OFF 2 packs - Configs equip cooling to override mode - Turns off all airflow + heat to LLCs - Closes master trim air valve

Question 25

What happens when CARGO FIRE DEPRESS/DISCH is pressed while MAIN is ARMED?

Answer 25

Initiates airplane depressurization to slight below airplane altitude.

Question 26

What happens when CARGO FIRE DEPRESS/DISCH is pressed while FWD/AFT is ARMED?

Answer 26

Initiates extinguisher discharge sequence