What areas do the fire detection and extinguishing (FIDEEX) monitor?
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Engine
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Main Landing gear
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APU
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Cargo compartments
Where does the FIDEEX unit provide fire extinguishing?
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APU
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Cargo Compartments
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Engine
What area's have smoke detection systems?
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Cargo bays
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Lavatorys
What compartments provide fire and overheat detection?
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Engines
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APU
What does an illuminated BOTTLE 1 and 2 ARMED PUSH TO DISCH switchlight during the test of the fire warning system?
The applicable squib will operate normal
When the heat sensing elements are subjected to heat, the:
Resistance decreases
How many squibs does the APU firex bottle have?
1
Where is the APU firex bottle located?
Aft Equipment Bay
Fire detection and extinguishing is provided in the:
Left and Right nacelles and APU areas
When the heat sensing elements are subjected to heat, the:
thermistor material has a decrease in resistance
Most fire detection systems use a dual loop mounted in parallel, which system does not?
Main Landing Gear Bay Overheat system
The fire detection system for the nacelles use:
A dual loop sensing element mounted in parallel
The engine firex bottles are located in the:
Aft Equipment bay
The firex bottles are charged with:
Halon 1301 at 600 to 625 psi with dry nitrogen
An APU fire on the ground will cause:
Shutdown of the APU, automatic discharge of the firex bottle and display a message on EICAS
The lavatory firex bottle is discharged by:
Heat sensitive capsule melting allowing the bottle to discharge
Pushing the ENG FIRE push light "IN" will:
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Arm the dedicated squibs to the affected engine
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Close the following SOVs:
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Fuel
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Hydraulic
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Bleed air
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Shutdown the Engine Driven Generator
- Fuel
- Hydraulic
- Bleed air
Engine fire messages are displayed:
On the Eicas Primary Page
The fire bell can be silenced by pushing "IN" on the:
Master Warning switch light
Pushing the MASTER WARNING switch/light will silence aural warnings
EXCEPT:
- Stall warbler
- GPWS/TCAS voice or aural alerts
- Overspeed clacker
- Flap clacker
- Stab trim clacker
- AP disconnect cavalry charge
- Takeoff Configuration warnings
- Gear horn
ENG BOTTLE LO messages are displayed on:
EICAS Primary Page
What unit controls the Fire Protection, Smoke Detection, and Fire Extinguishing Systems?
FIDEEX Unit
The FWD/AFT Cargo Bays have both Smoke Detection and Fire Extinguishing equipment but not:
Fire Detection equipment
Engine and APU Fire/Overheat Detection is accomplished by which number of loop(s) in the engine areas and APU compartments?
Two
When is a Fire Warning generated?
In a dual loop config, when both loops sense a Fire / Overheat condition.
If one loop fails, the system will revert to a single loop config and only that loop needs to sense a Fire / Overheat condition.
The MLG Bay Overheat system is a single loop system by default
Fire Extinguishing Units are powered by which electrical bus?
DC Emergency Bus, which is always supplied by power
Fire Detection system is powered by which electrical bus?
DC Battery Bus, which means power must be switched on in order for this system to work
Does a squib fire to release Halon into the lavatory waste bin?
No
Can the FIDEEX Control unit discriminate between a real and false fire indication?
Yes, the computer measures how quickly the loop heats up and is able to decide if it is true or false
Will the APU bottle automatically discharge in flight?
No
When the respective CARGO FIREX BOTTLE ARMED PUSH TO DISCH switch is pressed, what happens?
One bottle will discharge completely, and the other bottle discharges slowly over an extended period of time