Fire Protection

Question 1

Fire detection, warning and extinguishing are provided for ___?

Answer 1

engines, APU, lower cargo compartments, and the lavatory

Question 2

What are some areas that have fire detection and warning but no extinguishing?

Answer 2

1. Crew rest compartments have smoke detections systems
2. Main gear wheel wells have fire detection

–(no extinguishing system provided for either)

Question 3

How is the the fire extinguishing system different on the main deck

Answer 3

The main deck cargo compartment uses a suppression system to extinguish a fire by initiating a controlled cabin depressurization.

Question 4

How many fire extinguisher bottles are there for each system? (engines, APU, lower cargo compartments and lav)

Answer 4

Engines: 2 bottles per wing
APU: 1 Bottle
Lower cargo: 4 Bottles
Lav: 1 automatic fire extinguisher is located in the waste compartment in each lavatory

Question 5

If an engine fire switch is pulled out, what happens? When you rotate?

Answer 5

1. Closes engine spar fuel vales
2. Closes engine bleed air valve
3. trips off engine generator
4. shuts off hydraulic fluid to EDP
5. arms bother fire bottles

-When rotated it discharges selected bottle

Question 6

What are the ways an engine fire switch unlocks?

Answer 6

1. Fire warning
   2.fuel control switch is in cut off
2. Engine override switch is pushed (under fire switch)

Question 7

What happens when a fuel control switch is placed in cut off?

Answer 7

1.Closes fuel valve
2. Removes igniter power
3. Commanded respective hydraulic demand pump to operate if demand pump is in auto
4. Unlocks engine fire switch

Question 8

APU fire switch is pulled out, what happens? How about when you rotate?

Answer 8

1. Arms APU fire ext bottle
2. Closes APU fuel valve
   3.Closes APU bleed air valve
3. Closes APU air inlet door
4. Trips APU generator field and breaker
   6.shuts down APU (If not already shut down automatically)

–ROTATE–
Discharges bottle

Question 9

The red lettering on Engine fire switch, APU fire switch, cargo fire switch and fuel control switches illuminate red when

Answer 9

Related fire is detected or Fire/Overheat test switch is pushed

Question 10

Amber DISCH means that

Answer 10

a bottle has been discharged or has low pressure

Question 11

If an APU fire is detected, will the APU shut down automatically? Will it discharge a bottle?

Answer 11

1. APU will shut down automatically
2. Will discharge a bottle

Question 12

What happens when a MAIN deck ARMED switch is pushed?

Answer 12

FWD
1. Enables main deck fire suppression
2. Turns off two packs
3. Configures equipment cooling in to closed loop and turns off all airflow to main deck/ airflow and heat to lower cargo compartments
4. Closes master trim air valve

Question 13

What happens when a AFT or FWD cargo fire ARM switch is pushed?

Answer 13

1. Turns off two packs
2. Arms lower cargo compartment fire extinguishers
3. configures equipment cooling to override mode
4. Turns off all airflow and heat to lower cargo compartments
5. closes master trim air valve