Fire Extinguishing Flashcards
How many fire detectors do the engines have and where are they located?
4 total
2 in each engine pylon
2 in each engine accessories compartment
What does the lavatory fire detection system consist of?
Smoke detector
Waste basket fire extinguishing bottle.
What is the engine fire detection system made of?
Helium filled tube with a hydrogen core.
How does the tube detect a fire?
Heat causes helium to expand and trip a pressure switch.
How is the fire tube integrity monitored?
Internal pressure keeps and integrity switch open.
What powers the fire detection systems for the engines and APU?
Essential bus 1 - engine 1
Essential bus 2 - engine 2, APU
How is fire detected in the APU?
A single fire and overheat detection system.
When will the APU shut down automatically with a fire detected?
When it is on the ground.
How many extinguishing bottles does the engine and APU have? Where are they located?
2 for the engines
1 for APU
In the tail cone
How much do the fire bottles hold?
5lbs for engines
1lb for APU
600psi
How is the fire extinguishing bottle discharged?
Electrically actuated cartridge fires a slug to break the seal.
What bottles are connected to which engine?
Both bottles are connected to both engines.
How are the extinguishing bottles powered?
Bottle A hot battery bus 1
Bottle B hot battery bus 2
APU bottle essential bus 2
How is the lavatory fire bottle discharged?
Temperature sensitive head melts?
How many baggage compartment smoke detectors are there and where?
2 in the ceiling.
How is fire extinguished in the baggage compartment?
1 high rate discharge bottle
1 metering discharge bottle
How long can the metering discharge bottle continue releasing extinguishing agent?
50 minutes
What class baggage compartment does the emb 145 have?
Class c
What happens when fire is detected in the baggage compartment?
The fan shuts down and the baggage extinguishing button illuminates.
What shutoff valves close when you pull the fuel handle?
Fuel
hydraulic
Bleed air
Engine anti ice
What are you looking for in the fire test?
Fire bell Master warning and caution lights T handle lights Baggage extinguisher light 3 warning 2 caution EICAS message
How much time must elapse between fire tests?
6 seconds
What will make the baggage extinguishing button illuminate?
Smoke detection
Recirculating fan stoppage
