Fire Protection Flashcards

1
Q

What does the fire protection system provide fire detection and extinguishing capabilities for?

A

engines, APU, cargo compartments and lavatories

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2
Q

What happens when you pull the fire extinguishing handle?

A

shuts off the fuel and hydraulic shutoff valves and and bleed air valves

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3
Q

what happens when you rotate the fire handle left/right?

A

discharges the fire extinguishing bottle into the respective engine

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4
Q

what does the APU fire extinguishing guarded button do?

A

momentary action button
closes APU fuel shutoff valve and discharges the APU fire extinguisher bottle

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5
Q

what does the cargo fire detection/ fire extinguishing button (guarded)

A

momentary action button
according to system logic, discharges the high and low-rate bottles of the associated cargo compartment when the button is lit.
pressing the button when it is not illuminated arms the associated extinguishing bottle and the button illuminates red.

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6
Q

how long do you push the fire test button for? what happens if you hold it for too long?

A

3 seconds. anything more than 10 shuts the APU down

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7
Q

What are you looking for when you push the fire detection system button?
what does it does?

A

6-2-2-7
Overhead Panel: (6)
Fire handle 1
Fire handle 2
Cargo smoke (aft) extinguishing button
Cargo smoke (Fwd) extinguishing button extinguishing button
APU extinguishing button
APU EMERG STOP (top half of button)

Glare shield lights: (2)
Master warning light (left)
Master warning light (right)

Aural: (2)
Fire Bell
Triple Chime

EICAS MSGS (7)
ENG 1 FIRE
ENG 2 FIRE
CARGO FWD SMOKE
CARGO AFT SMOKE
APU FIRE
FIRE (Engine 1 ITT gauge)
FIRE (Engine 2 ITT gauge)

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8
Q

what is the fire protection system designed for?

A

fire detection, protection and continuous built in tests (BITs) to detect internal faults

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9
Q

what supplies electrical power for electrical fire detection?

A

MAU 1 (DC essential bus 1) and MAU 3 (DC essential bus 2)

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10
Q

what supplies electrical power for fire extinguishing?

A

HOT BATT BUS 1 and HOT BAT BUS 2

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11
Q

what is the APU Fire Extinguishing system comprised of?

A

one push button
one discharge bottle

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12
Q

what happens when you push the APU Fire Extinguishing button?

A

discharges the APU bottle
shuts down the APU thru the APU FADEC
closes the APU fuel shut off valve (SOV)
displays EICAS msg: APU FIREX BTL DISCH

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13
Q

Where is the APU bottle located?

A

near the rear fuselage

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14
Q

how many smoke detectors are in the cargo bays?

A

3 fwd
2 aft

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15
Q

what happens if smoke is detected in the fwd cargo bay?

A

air circulation fan automatically close and outflow valve closes
FWD fire extinguishing bottle is armed

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16
Q

what happens if smoke is detected in the aft cargo bay?

A

AFT fire extinguishing bottle is armed

17
Q

what is the cargo fire extinguishing system comprised of?

A

one high-rate extinguishing
one low rate extinguishing

18
Q

Where are the cargo fire extinguishing bottles located?

A

center avionics bay - can be used for either compartment

19
Q

what happens after the annunciation of smoke detection in the cargo compartment?

A

pressing the associated cargo compartment button causes
the high-rate bottle to discharge immediately into selected cargo compartment.
the EICAS ADVISORY message CRG FIREX HI DISCH to display

one minute later the second fire extinguishing bottle discharges automatically at a reduced flow rate and the agent remains in the selected cargo compartment for 60 minutes

20
Q

what smoke detection/protection do we have in the lavatories?

A

one smoke sensor on the ceiling, one fire extinguisher bottle in each lav waste container.

21
Q

what happens if smoke is detected in either lavatory?

A

the mast WARNING light illuminates
the EICAS WARNING msg LAV SMOKE is displayed
in the lav where smoke has been detected - an alarm sounds and smoke detector light comes on
flashing amber light on the respective attendant lights panel (rainbow?) illuminates

22
Q
A