Study Guide Fire Protect/Detect

Question 1

What airplane systems have fire detection and protection?

Answer 1

• Engines
• APU
• Cargo Compartments
• Lavatories

Question 2

Are the cockpit and cabin protected from fire?

Answer 2

• Yes
• Cockpit 1 hand held Halon fire extinguisher
• Cabin 4 hand held Halon Fire extinguisher (2 fwd & 2 aft)

Question 3

How are the engines and APU protected from fire?

Answer 3

• Engines 2 Halon fire bottles

- APU 1 Halon fire bottle dedicated to the APU only

Question 4

Can both engine fire bottles be used for one engine if needed?

Answer 4

Yes

Question 5

What is the power source for engine and APU fire detection and protection?

Answer 5

• Engine Detection DC ESS
• Engine Protection HOT BATT
• APU Detection DC ESS
• APU Protection DC ESS

Question 6

Describe the engine and APU fire detection system

Answer 6

• Engine 8 pneumatic fire detectors (2 loops) per engine

- APU 2 pneumatic fire detectors (2 loops)

Question 7

Describe the fire test

Answer 7

-Press and hold the test button on the overhead panel for a minimum of 3 seconds, but no more than 10 seconds is the APU is running or it will automatically shutdown the APU

• Aural warnings
  
  • Fire bell
  • Triple chime
• Visual indications
  
  • Overhead panel
    
    • Fire handle 1
    • Fire handle 2
    • Cargo smoke (FWD) extinguisher button
    • Cargo smoke (AFT) extinguisher button
    • APU extinguisher button
    • APU EMER STOP (top half of button)
• Glare Shield
  
  • Master warning light (left)
  • Master warning light (right)
• EICAS
  
  • ENG 1 FIRE (CAS message)
  • ENG 2 FIRE (CAS message)
  • CARGO FWD SMOKE (CAS message)
  • CARGO AFT SMOKE (CAS message)
  • APU FIRE (CAS message)
  • [FIRE] (Engine 1 ITT gauge)
  • [FIRE] (Engine 2 ITT gauge)

Question 8

What happens when an engine fire handle is pulled?

Answer 8

• Closes respective engine fuel SOV
• Closes respective engine hydraulic SOV
• Closes respective engine bleed SOV

Question 9

What is an indication of and APU fire?

Answer 9

• Fire Bell
• Red Stripe in the EMER STOP button
• APU FIRE is displayed on the EICAS

Question 10

Will the APU automatically shutdown if fire detected?

Answer 10

Only on the ground

Question 11

What happens is the APU EMER STOP button IS pushed after a fire has been detected?

Answer 11

• APU shuts off immediatley
• APU fuel SOV closes
• APU FIRE EXTG button illuminates

Question 12

What happens is the APU EMER STOP button is NOT pushed after a fire has been detected?

Answer 12

After ONE minute the APU FIRE EXTG button illuminates

Question 13

Will the APU fire extinguisher automatically discharge?

Answer 13

No

Question 14

How many smoke detectors are installed in the cargo compartments?

Answer 14

• 3 in the FWD compartment

- 2 in the AFT compartment

Question 15

What happens to the forward cargo compartment in the event smoke is detected?

Answer 15

• Recirculation fan shuts off

- Ventilation outflow valve closes

Question 16

What is the purpose of the Recirc and ventilation fans shutting off when a smoke in forward cargo?

Answer 16

• Prevents oxygen from entering the compartment

- Prevents Halon agent from escaping into the aircraft’s cabin

Question 17

How many extinguishing bottles are installed for the cargo compartments?

Answer 17

• 2 bottles used for both compartments

- 1 high rate and one low rate bottle

Question 18

What is the difference between the high rate and the low rate bottles?

Answer 18

• High rate bottle saturates the compartment immediately

- Low rate bottle maintains saturation over a duration of time

Question 19

How long will the low rate bottle remain active in the compartment>

Answer 19

60 minutes

Question 20

Can one bottle be used for one compartment and the other bottle for the other compartment?

Answer 20

No. Only once compartment may be selected (FWD or AFT)

Question 21

What happens when a cargo extinguishing button is pushed IF SMOKE HAS BEEN DETECTED?

Answer 21

• High rate bottles discharge immediately
• Low rate bottle discharges after one minaret if the airplane is in flight
• If airplane is not he ground (weight-on-wheels) the low rate bottle will NOT automatically discharge

Question 22

During flight, can the low rate bottle be discharged before the minute is up?

Answer 22

Yes, by pushing the extinguishing button again

Question 23

How can the low rate bottle be discharged if the airplane is on the ground (weight on wheels)?

Answer 23

The extinguishing button must be pushed again

Question 24

Can cargo extinguishing be used IF NO SMOKE IS DETECTED?

Answer 24

• Yes. The high rate bottle extinguishing button must be pushed twice, once to arm the bottle and once to discharge the bottle.
• The low rate bottle automatically discharges after one minute if in flight

Question 25

How are the lavs protected from fire?

Answer 25

Heat sensative extinguishers in the lav waste bins automatically discharge if a predetermined temperature is reached