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E175 > Fire Detection/ Protection Questions > Flashcards

Fire Detection/ Protection Questions Flashcards

1
Q

Are the cockpit and cabin protected from fire?

A

Yes
Cockpit 1 hand-held halon fire extinguisher
Cabin 3 hand-held halon fire extinguisher (1 fwd. & 2 aft); one water extinguisher (aft)

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2
Q

How are the engines and APU protected from fire?

A

Engines: 2 halon fire bottles
APU: 1 halon fire bottle dedicated to the APU only

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3
Q

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

A

Yes

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4
Q

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

A

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

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5
Q

Describe the engine and APU fire detection system

A

Engine: 8 pneumatic fire detection system (2 loops) per engine
APU: 2 pneumatic fire detectors (2 loops)

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6
Q

Describe the fire test

A

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

Aural warnings (2)
•Fire Bell
•Triple Chime

Visual indication
• Overhead panel (6 lights)
   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 (2 lights)
Master warning light (left)
Master warning light (right)

•EICAS (7 messages)
   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)
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7
Q

What happens when an engine fire handle is pulled?

A

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

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8
Q

What is an indication of an APU fire?

A

Fire bell
Red stripe in the EMER STOP button
APU FIRE is displayed on the EICAS

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9
Q

Will the APU automatically shut down if a fire is detected?

A

Only on the ground

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10
Q

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

A

APU shuts off immediately without a 1-minute cool-down

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11
Q

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

A

After one minute the APU FIRE EXTG button illuminates

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12
Q

Will the APU fire extinguisher automatically discharge?

A

No

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13
Q

How many smoke detectors are installed in the cargo compartments?

A

3 detectors in the FWD compartment

2 detectors in the AFT compartment

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14
Q

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

A

Recirculation fan shuts off

Ventilation outflow valve closes

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15
Q

What is the purpose of the recirc fan off and ventilation outflow valve closing?

A

Prevents oxygen from entering the compartment

Prevents halon agent from escaping into the aircraft’s cabin

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16
Q

What airplane systems have fire detection and protection?

A

Engines
APU
Cargo Compartments
Lavatories

17
Q

How many extinguishing bottles are installed for the cargo compartments?

A

2 bottles used for both compartments

1 high-rate bottle and 1 low-rate bottle

18
Q

What is the difference between the high-rate bottle and the low-rate bottle?

A

High rate bottle saturated the compartment immediately

Low rate bottle maintains saturation over a duration of time

19
Q

How long will the low-rate bottle remain active in the compartment?

20
Q

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

A

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

21
Q

What happens when a cargo extinguishing button is pushed if smoke has been detected?

A

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

22
Q

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

A

Yes, by pushing the extinguishing button again

23
Q

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

A

The extinguishing button must be pushed again

24
Q

Can cargo extinguishing be used if smoke is detected?

A

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 the one minute if in flight

25
Q

How are the lavs protected from fire?

A

Heat-sensitive extinguishers in the lab waste bins automatically discharge if a predetermined temperature is reached

E175 (17 decks)

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