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15 Cards in this Set
- Front
- Back
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1. Fire detection is provided in which areas? Which areas are single loop and which are dual loop?
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Engine - dual
Jetpipe - dual Pylons - dual APU - dual Main Landing Gear bay – single |
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2. Fire extinguishing is provided in which areas?
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Engine core area, cargo compartment, lavatory, passenger cabin (portable extinguishers), cockpit (portable extinguisher)
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3. How is a fire detected in the cargo compartment?
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Smoke detector, smoke %
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4. Name all the things that occur when the smoke density exceeds a predetermined level in the cargo compartment?
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CARGO SMOKE on EICAS
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5. What are the engine Firex bottles charged with and where are they located?
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Halon, within the engine compartment
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6. What automatically occurs when an APU fire is sensed on the ground?
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APU shuts down automatically. After 5 seconds, APU detonates fire extinguishing bottles and outdoor (external) warning horn sounds.
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7. Is fire protection and detection provided in the lavatory? If so describe it.
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Smoke detector and 2 wax squibs in trash pressurized with Halon.
SMOKE TOILET message on EICAS |
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8. What takes place when “ENGINE FIRE PUSH” is pressed in?
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Both explosive squibs armed.
Fire extinguishing bottle lights illuminate Fuel feed shutoff valve closes Bleed air shut off valve closes Hydraulic shutoff valve closes Engine driven generator is tripped off ***If pressed again, all of the above is reset. |
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9. What takes place when “APU FIRE PUSH” is pressed in?
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APU fire extinguishing bottle button is armed, “BOTTLE ARMED PUSH TO DISCH”
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10. Where are Engine fire messages normally displayed?
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EICAS primary page (and master caution/warning lights)
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11. How is the fire bell silenced?
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Lift cover and press “RH ENG FIRE PUSH” fire warning button.
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12. What must occur to discharge the engine firex bottle?
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Press the green-illuminated discharge button after it has been armed by pressing the engine fire PBA.
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13. Where is “ENG BOTTLE LOW” message displayed?
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EICAS Primary Page
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Describe how a loop type fire detection system signals a fire.
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Heat melts/compromises ceramic beads, which increases the contact area between beads and decreases their electrical resistance. The wires within are then able to send current through the other wire (dual loop) or to the wall of the wire
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"FDCU"
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Fire Detection Control Unit
Monitors detection loops and their comparative resistance. Gives FIRE/OVHT signal to EICAS. Capable of distinguishing “false fire” |
