Fire Systems Flashcards

1
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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2
Q

Will the APU shut down if a fire is detected

A

Only on the ground

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3
Q

Describe the APU fire detection systems

A

1 pair of fire detectors

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4
Q

Can one bottle be used for 1 compartment

and 1 bottle for the other compartment

A

No

Only one compartment gets both bottles fwd or aft

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5
Q

Will the APU fire extinguisher automatically discharge?

A

No

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6
Q

Describe the fire test

A

Press and hold the fire test button on the overhead panel for a minimum of 3 seconds (no more that 10 seconds if the APU is running or it will shutdown)

AURAL WARNING:

  • Fire bell and triple chime

VISUAL INDICATIONS (Overhead Panel):

  • Fire handle 1 & 2
  • Cargo smoke fwd and aft
  • APU fire extinguisher button and APU emergency stop top half of button

GLARE SHIELD:

  • Master warning light left and right

EICAS:

  • ENG FIRE 1 & 2
  • CARGO SMOKE FWD/AFT
  • APU FIRE
  • ITT GUAGES FIRE
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7
Q

What happens to the fwd cargo compartment

in the event smoke is detected?

A
  • Recirc fan shuts off
  • Ventilation outflow valve closes
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8
Q

Are the cockpit and cabin protected from fire?

A

Yes

Cockpit:

  • 1 hand held halon fire extinguisher

Cabin:

  • 3 handheld fire extinguishers 1 fwd 2 aft
  • 1 water aft
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9
Q

Describe the Engine fire detection systems

A

8 pneumatic fire detectors (2 Loops per engine)

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10
Q

What happens if the APU EMERG STOP button

is pushed after a fire has been detected?

A
  • APU shuts off immediately (no 1 minute cooldown)
  • APU FUEL SOV closes
  • APU FIRE EXTG button illuminates
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11
Q

How long will the low rate bottle take to discharge

A

60 minutes

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12
Q

What happens if the APU EMERG STOP button

is not pushed after a fire has been detected?

A

After one minute the FIRE EXTG button illuminates

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13
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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14
Q

Can both engine fire bottles be used for 1 engine?

A

Yes

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15
Q

How are the LAVs protected from fire

A

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

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16
Q

How many extinguishing bottles are installed

for the cargo compartments?

A

2 bottles for both compartments

1 high rate and 1 low rate bottle

17
Q

What happens when a engine fire handle is pulled?

A

Closes respective engine:

  • FUEL SOV
  • HYD SOV
  • BLEED SOV
18
Q

What happens when cargo extinguishing button

is pushed if smoke has been detected?

A

High rate bottle discharges immediately

Low rate bottle discharges after 1 minute if the airplane is inflight

If airplane is on the ground, the low rate bottle

will not automatically discharge

19
Q

What is the purpose of the recirc fan shutting off and

ventilation outflow valve closing when smoke

is detected in the fwd cargo compartment?

A
  • Prevents oxygen from entering the compartment
  • Prevents Halon from escaping
20
Q

How many smoke detectors are in the cargo compartments?

A
  • 3 fwd
  • 2 aft
21
Q

What airplane systems have fire detection and protection?

A
  • Engines
  • APU
  • Cargo compartments
  • Lavatories
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

Can cargo extinguishing be used if no smoke is detected

A

Yes the extinguishing button must be pushed twice once to arm the bottle and once to discharge the bottle

The low rate bottle automatically discharges after 1 minute if in flight or if the button is pushed a 3rd time on the ground

24
Q

What is the difference between the

high rate and low rate bottle?

A

High rate bottle saturates immediately

Low rate bottle saturates over 60 minutes

25
How can the low rate bottle be discharged if the airplane is on the ground
The extinguishing button must be pushed again
26
What is an indication of an APU fire?
* Fire bell * Red stripe in the EMERG STOP button * APU FIRE is displayed on the EICAS