Fire Protection

Question 1

What are the fire detection loops made out of?

Answer 1

Stainless steel capillaries tube containing helium and hydrogen

Question 2

The left essential bus powers which loops for the engine fire protection system?

Answer 2

The left essential bus powers Loop A for engine number one and Loop B for engine number two

Question 3

Which loops of the fire protection system does the right essential bus power?

Answer 3

The right essential bus powers loop A for engine number two and loop B for engine number one

Question 4

How does each responder unit detect engine fire conditions in the engine nacelle?

Answer 4

By sensing the gas pressure in its loop.

Question 5

If one of the fire sensing loops sends a fire warning to the cockpit what should you see?

Answer 5

Both red engine fire press to reset switch lights will flash, the pull fuel off handle of the affected engine will illuminate, the check fire detection warning light, on the caution/warning panel will flash, the master warning press to reset switch light will flash and the fire bell will sound.

Question 6

How is the fire bell cancelled?

Answer 6

By pressing either of the engine fire press to reset switch lights

Question 7

What’s the fire extinguisher chemical used In the fire detection loops?

Answer 7

Halon 1301

Question 8

Where are the fire extinguisher bottles located?

Answer 8

Located in the left wing root fearing

Question 9

Each extinguisher bottle has two discharge valves how are they actuated?

Answer 9

Each are actuated by electronically detonated explosive cartridges called, squibs

Question 10

If the pull fuel off handles are pushed back in what occurs?

Answer 10

Fuel and hydraulics are restored and the bottles are disarmed.

Question 11

When the fire is extinguished what happens to the pull Fuel off handle and all fire warnings?

Answer 11

The pull fuel off handle will extinguish and all fire warnings will go out.

Question 12

What powers the fire extinguisher discharge circuits?

Answer 12

The battery bus to ensure fire extinguisher operation in the event of an electrical power failure

Question 13

What is the discharge indication when the extinguishant is discharged into the nacelle ?

Answer 13

The yellow disc discharge indicator

Question 14

What does the red disc indicate?

Answer 14

The red disc is the thermal discharge indicator and is ejected by extinguishant escaping to the atmosphere due to thermal expansion.

Question 15

What kind of Fire protection in the baggage compartment?

Answer 15

To smoke detectors provide visual warning in the flight compartment of an incipient or active fire in the baggage area

Question 16

If the smoke detectors in the baggage area detect fire what indications in the flight deck do you get?

Answer 16

The smoke warning light on the warning light panel illuminates for as long as the smoke is present.

Question 17

Testing the baggage smoke warning system illuminates which warning lights?

Answer 17

The smoke warning light and master warning Switch light

Question 18

How many 1.5 kg BCF hand held fire extinguishers are provided on the aircraft?

Answer 18

Four

Question 19

If the lavatory smoke alarm is activated what occurs?

Answer 19

A loud continuous alarm will be produced by the unit a single chime is heard in the cabin and a steady red light illuminates on the flight attendant annunciator panel.

Question 20

What indication do you get of a fire in the baggage compartment?

Answer 20

Illumination of the smoke warning light

Question 21

The effect of a single fire detection loop failing is what?

Answer 21

There is no affect on fire detection capability

Question 22

Ilumination of an amber bottle light on the fire protection panel indicates what?

Answer 22

The bottles is armed

Question 23

Fire detection in the lavatory is achieved by what?

Answer 23

Single smoke detector

Question 24

During an engine fire detection test is the fire bottles armed indication observed ?

Answer 24

No

Question 25

Fire detection in the engine nacells is provided by what?

Answer 25

Heat sensing loops

Question 26

Does the pull fuel off handle flash when you get an indication of a fire in the number one engine nacelle ?

Answer 26

No