Fire Protection Flashcards
What is the difference between fire detection and fire prevention?
Fire detection is the ability to detect a fire, prevention is the ability to put a fire out.
What powers the engine fire protection system?
The onside Essential DC Bus.
What powers the APU fire detection system?
Essential DC Bus 2.
What powers the baggage fire protection system?
Essential DC Bus 1.
What powers the fire bottles?
The on side hot bus.
How are fires extinguished?
By halon gas which consumes the oxygen and suffocates the fire.
How is the engine fire detection system arranged?
There are two fire loops. One that surrounds the engine, the other in the pylon.
How is the fire loop reset?
If a fire has been detected and extinguished, after it cools down the system resets.
What happens when the T handle is pulled?
H - Hydraulic valve is closed.
A - Air bleed is closed.
L - Lip (engine inlet) air is closed.
F - fuel shutoff valve is closed.
How many engine fire bottle are installed?
Two. One for each engine.
These may be ‘cross fired’, so there is a secondary extinguishing shot if the first fails.
Does the APU have a fire bottle?
Yes, but it is automatically triggered. Powered by DC Essential Bus 2.
How is smoke detected in the lavatory?
A smoke detector that detects particles in the air (so things other than smoke may set it off).
There is also a lavatory trash fire detector and dedicated extinguisher.
How is the lavatory trash fire extinguisher triggered?
Automatically when wax melts off the nozzle.
