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E175 Study Guide > Fire Protection > Flashcards

Fire Protection Flashcards

1
Q

What airplane systems have Fire Detection and Protection?

A
  • Engines
  • APU
  • Cargo Compartments
  • Lavatories
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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 one engine if needed?

A

YES

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4
Q

Describe the Fire Test?

A
  • When the TEST button on the fire protection panel is pressed, it initiates
    the following:
  • AURAL
  • The fire aural warning(s) sound.
  • LIGHTS
  • The master WARNING lights flash.
  • The fire extinguisher handles illuminate steady.
  • The APU fire-extinguishing button and the upper half of the APU
    emergency stop button to illuminate.
  • EICAS MESSAGES
  • ENG 1 FIRE
  • ENG 2 FIRE
  • APU FIRE
  • CRG AFT SMOKE
  • CRG FWD SMOKE
  • EICAS INDICATIONS
  • The FIRE warning light on the ITT indicators illuminate.
  • SYSTEM CONFIGURATIONS
  • The forward cargo compartment fan turns off
  • The cargo compartment ventilation outflow valve closes
  • (Only when bleed air is being provided by the engines or the APU).
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5
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.
  • Closes the Crossbleed Valve
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6
Q

What is an indication of an APU fire?

A
  • Fire Aural Warning(s)
  • Red stripe in the EMER STOP button.
  • APU FIRE is displayed on the EICAS
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7
Q

When will the APU automatically shut down if a fire is detected?

A
  • On the ground (after 10 seconds)
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8
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)
  • APU fuel SOV closes
  • APU FIRE EXTG button illuminates
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9
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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10
Q

Will the APU fire extinguisher automatically discharge?

A
  • NO
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11
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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12
Q

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

A
  • FWD Cargo Recirculation Fan shuts off

- FWD Cargo Ventilation Outflow Valve closes

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13
Q

How many fire extinguishing bottles are installed for the cargo compartments?

A
  • 2 bottles (may only be used in one compartment)

- 1 high-rate bottle and 1 low-rate bottle.

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14
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.

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15
Q

How long will the halon remain active in the compartment if both the high and low rate bottles are discharged?

A

75 minutes with a 60 minute diversion time allowed.

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16
Q

Can one bottle be used for one compartment and the other bottle for the other
compartment? (Cargo)

A

No

17
Q

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

A
  • YES, by pushing the extinguishing button again.
18
Q

How are the Lavs protected from fire?

A
  • Thermal plugs that melt at a set temperature allowing release of the Halon
    bottle(s)
19
Q

Describe the Engine and APU fire detection and protection?

A
  • Engine: 4 Heat Sensing Loops (2 per engine)

- APU: 2 Heat Sensing Loops

20
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 (in flight)
  • If airplane is on the ground (weight-on-wheels) the low-rate bottle will not
    automatically discharge
21
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 pressed again
22
Q

Can cargo extinguishing be used if no smoke is detected?

A
  • Yes. The high-rate bottle extinguishing button must be pressed twice,
    once to arm the bottle and once to discharge the bottle.
  • The low-rate bottle automatically discharges after one minute (in flight)

E175 Study Guide (23 decks)

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