Fire Protection Ch. 7

Question 1

Where is the fire protection control unit (FPCU) located?

Answer 1

Right side of the baggage compartment

Question 2

What is the primary design function of the FPCU?

Answer 2

Monitor and sensor data in various systems

Question 3

What does the FPCU monitor and report the health of?

Answer 3

The entire Fire Protection System (FPS)

Question 4

Where are the FPCU outputs supplied to?

Answer 4

The Data Concentrator Units then to the CAS display system for caution/warning functions

Question 5

What would cause a L or R Bleed Air Leak CAS message?

Answer 5

A overheat condition sent from the Pylon Overheat Detection System

Question 6

What does Fire Zone 1 provide?

Answer 6

Detection & suppression

Question 7

What does fire zone 2 provide?

Answer 7

Detection only

Question 8

What will the APU do if a fire condition is sensed?

Answer 8

Automatically shut down

Question 9

When would the APU not automatically shut down?

Answer 9

During the APU Fire Detection Test

Question 10

If on the ground, how would the APU alert for a fire?

Answer 10

A fire warning horn

Question 11

What monitors the bleed air distribution ducts, air turbine starter, and wing anti-ice ducts?

Answer 11

Overheat Detection System

Question 12

What is the overheat detection sub system designed to protect the aircraft from?

Answer 12

Overheat conditions that arise from leaks or other failures in the hot bleed air system

Question 13

What is a key design feature for the ODS?

Answer 13

The FPCU can detect an overheat event and report the event location to the aircraft maintenance computer

Question 14

How many fire extinguishers are there for the engines?

Answer 14

Two

Question 15

How are the fire extinguishers controlled?

Answer 15

Two fire handles, and an APU ARM/EMPTY switch

Question 16

How do the handles indicate that there is a fire in the engine?

Answer 16

Illumination of the respective handle by the FPCU

Question 17

What does pulling the fire handle do? What does rotation do?

Answer 17

Sends a shut down signal to the FADEC, closes the hydraulic shut off valve, closes the engine fuel shut off valve

Rotation causes the cartridge to detonate and release the fire extinguisher in bottle contacts

Question 18

What is the APU fire extinguishing system powered by?

Answer 18

Left emergency DC bus

Question 19

What happens if the left emergency DC bus is not powered and an APU fire is detected?

Answer 19

The APU fire extinguishing system cannot extinguish a fire

Question 20

Where is the smoke detector located? When is it functional?

Answer 20

Aft baggage compartment, anytime the right emergency
DC bus is powered

Question 21

How can smoke be removed from the baggage compartment?

Answer 21

A Baggage dump valve is in the baggage compartment, which will dump the baggage compartment air to the aft fuselage

Question 22

What happens when the APU “FIRE” push button is pressed?

Answer 22

2 fire extinguisher bottle is armed

FPCU delivers a control signal to close the APU fuel isolation valve (fire valve)

FPCU delivers the APU shut down command that goes to the APU ECU to close the APU fuel shut off valve

Question 23

When is the #2 fire bottle discharged? What color is the CAS message - in flight & on the ground?

Answer 23

When the APU arm/empty switch is pressed & indicates amber EMPTY

Flight - Cyan
Ground - Amber