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E-Jet EMB175 > Fire Detection / Protection Questions > Flashcards

Fire Detection / Protection Questions Flashcards

1
Q

What airplane systems have fire detection and protection?

A
  • Engines
  • APU
  • Cargo compartments
  • Lavatories
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2
Q

Are the cockpit and cabin protected from fire?

A
  • Yes
  • Cockpit 1 hand-held Halon fire extinguisher
  • Cabin 3 hand-held Halon fire extinguishers (1 fwd & 2 aft) one water extinguisher (aft)
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3
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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4
Q

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

A
  • Yes
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5
Q

What is the 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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6
Q

Describe the engine and APU fire system?

A
  • Engine 8 pneumatic fire detections (2 loops) per eng

- APU 2 pneumatic fire detectors (2 loops)

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7
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
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8
Q

Aural warning

A
  • Fire bell

- Triple chime

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9
Q

Visual Indications

A
  • 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)
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10
Q

What happens when an engine fire handle is pulled?

A
  • Closes respective engine fuel SOV
  • Closed respective engine hydraulic SOV
  • Closed respective engine bleed SOV
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11
Q

What is an indication of an APU fire?

A
  • Fire bell
  • Red strip in the EMER STOP button
  • APU FIRE is displayed on the EICAS
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12
Q

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

A
  • Yes, Only on the ground
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13
Q

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

A
  • APU shits off immediately without a 1 minute cool-down
  • APU fuel SOV closes
  • APU FIRE EXTG button illuminates
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14
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 button illuminates
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15
Q

Will the APU fire extinguisher automatically discharge?

A
  • No
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16
Q

How many smoke detectors are installed in the cargo compartment?

A
  • 3 detectors in the FWD compartment

- 2 detectors in the AFT compartment

17
Q

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

A
  • Recirculation fan shut off

- Ventilation outflow valve close

18
Q

What is the purpose of this (refer to above question)?

A
  • Prevents oxygen from entering the compartment

- Prevents Halon agent from escaping into the aircraft cabin

19
Q

How many extinguisher bottles are installed for the cargo compartments?

A
  • 2 bottles used for both compartments

- 1 high-rate bottles and 1 low-rate bottle

20
Q

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

A
  • High rate bottle saturates the compartment immediately

- Low rate bottle maintains saturation over a duration of time

21
Q

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

A
  • 60 minutes
22
Q

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

A
  • No, only one compartment maybe selected (FWD or AFT)
23
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
24
Q

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

A

Yes, by pushing the extinguishing button again

25
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
26
Q

Can cargo extinguishing be used if no 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 one minute if in flight
27
Q

How are the lav’s protected from fire?

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

E-Jet EMB175 (30 decks)

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