Fire Protection

Question 1

Which bottle can be discharged into the APU?

Answer 1

The left bottle

Question 2

How do you know if a fire bottle has discharged?

Answer 2

You get an associated CAS message

Question 3

How are the fire handles normally locked in the stowed position?

Answer 3

By an electrical solenoid

Question 4

What happens if a fire handle solenoid malfunctions?

Answer 4

A manual override button underneath each fire handle allows handle activation

Question 5

What happens when a fire handle is pulled?

Answer 5

It shuts off fuel at the tank, trips the Generator Control Unit (GCU), and shuts off hydraulics in the tail compartment

Question 6

What happens if the engine fire persists after discharging the first bottle?

Answer 6

The fire handle may be rotated to the inboard DISCH 2 position to inject the agent from the left fire bottle into the engine

Question 7

The smoke evacuation valve has how many positions?

Answer 7

Two (2)

Question 8

Fire testing, detection, and protection is available down to what source of power?

Answer 8

Main batteries only: it’s not available with emergency batteries

Question 9

What’s the location of the smoke detector?

Answer 9

Ceiling of the baggage compartment

Question 10

What happens when the smoke evacuation valve is selected to the VENT/SMOKE position?

Answer 10

The smoke evacuation valve opens and baggage compartment air is vented overboard through a vent on the ceiling of baggage compartment. Air is exhausted overboard through right side wing-to-body fairing near lavatory servicing.

Question 11

Can the interior baggage compartment door be opened once the baggage compartment is depressurized?

Answer 11

No, it’s impossible without equalizing the pressure between the baggage compartment and the cabin

Question 12

If the interior baggage compartment door is closed, what’s the process for reentry once the baggage compartment has been depressurized?

Answer 12

The smoke evacuation valve must be placed back to the NORMAL position, and the reset toggle switch must be held UP for 10 seconds. This causes the baggage compartment ventilation shutoff valve to reopen and restore airflow to the compartment.

Question 13

Describe the engine fire detection system.

Answer 13

Each detector rail assembly is comprised of two mechanically parallel, electrically independent thermal detector loops (Loop A and Loop B) mounted on a support tube.

Question 14

What computer monitors the fire detection system?

Answer 14

Fire detection control unit

Question 15

What happens if a fire loop fails?

Answer 15

The flight crew can deselect the affected loop and continue to operate in a single loop configuration (in accordance with MMEL).

Question 16

What happens when you depress the R ENG FIRE TEST switch?

Answer 16

You get three chimes and eight lights: LOOP A, LOOP B, two red W’s, two red CAS messages, light in the right fire handle, and the starlight in the right engine fuel control switch handle.

Question 17

Describe the APU’s fire detection system.

Answer 17

It has a seven foot helium filled tube secured to the top of the APU enclosure

Question 18

What happens to the APU during a fire?

Answer 18

The ECU automatically shuts down the APU

Question 19

What happens when the APU FIRE TEST switch is depressed?

Answer 19

You get three chimes and eight lights: APU TEST light on the fire test panel, FIRE light on the APU control panel, two red W’s, two amber C’s, and two CAS messages. Additionally, you get a fire bell in the nose wheel well if the aircraft is on the ground.

Question 20

What indications do you get for an actual APU fire?

Answer 20

You get three chimes and only four lights: FIRE light on the APU control panel, two red W’s, and one red CAS message. Additionally, you get a fire bell on the ground.

Question 21

Describe the equipment overheat detection system.

Answer 21

A number of thermal switches are installed in the aircraft interior and to monitor temperature levels. They utilize two preset temperatures: 150°F and 250°F, depending on location and type of equipment monitored. Switches set at a trip point of 150°F generate an amber CAS message when that temperature is reached and switches set at a trip point of 250°F generate a red CAS message (generally red for bleed air and amber for electrical).

Question 22

What’s the location of the fixed extinguisher bottles?

Answer 22

Two identical single shot fire bottles are mounted in the tail compartment: pressurized by nitrogen and filled with Halon.

Question 23

What happens if a bottle becomes over pressurized due to excessive temperature?

Answer 23

A pressure relief disc seal ruptures, allowing bottle contents to escape into the tail compartment

Question 24

What’s the location of portable fire extinguishers?

Answer 24

One Halon extinguisher in the cockpit, and two (2) Halon extinguishers in the cabin