11.8 Fire Systems Flashcards
What happens to engine fire system if the sensor is defective?
The crew will be notified
What is triggered by a fire?
Central and local warning
Central warning can be…. What?
Cancelled
Local warning will go off when?
The fire has gone out
What are the two features of APU in a fire detection situation on ground?
APU has ground warning of red light and horn
And auto shut off and auto extinguish when on ground
How does a semi conductor work?
As the temperature increases the resistance decreases
Describe an optical smoke detector
Light bounces off a detector which illuminates the sensor
What type is the portable fire extinguisher?
1211 portable
1301 fixed
What is halon pressurised by and what too?
Nitrogen and 600 psi
How is a fire extinguisher discharges?
Squib - (powder explodes when the electrical current heats up the wire(squib))
How do you tell if the bottle is overpressurised?
The red disk will be on the outside
How does a squib test work?
A small electrical circuit is set through the squib.
Is a cartilage a lifted item?
Yes, it expires after 10 years
What compartments get shut off when there is a fire?
. All fuel for engine and APU
. Hydaulic fluid for engines
. Oxygen for cargo compartments
What fire can halon be used on?
A, B , C
