Inspect, Check, Troubleshoot Fire Detectio Flashcards
What are four types of engine fire detection systems?
Thermoswitch system, thermocouple system, thermistor-type continuous loop system, pneumatic-type continuous-loop system
Which type of fire detection system operates on the principle of rate of temperature rise?
The thermocouple system
Why must the reference junction in a thermocouple fire detection system be thermally insulated?
This is a rate-of-temperature-rise system
How do you check a thermocouple fire detection system for operation?
Press the test switch
What would likely cause a false fire alarm in a thermistor-type continuous-loop system?
A kinked or pinched continuous loop element
If there is a break in a single-wire continous-loop fire detector element, and the system tests bad, will it indicate the presence of a fire?
Yes, even though it tests bad, it will still indicate the presence of a fire
How is a pneumatic-type continuous-loop fire detection system checked for operation?
When the test switch is closed, low-voltage through the tube that encloses the sensitive element
What maintenance is allowed on a continous-loop fire detection system checked for operation?
Inspect and replace as needed the continous-loop element, the controller, and the fire warning bell and or light
What is used as a fire extinguishing agent in some older aircraft?
Carbon dioxide
What fire extinguishing agent is used in the high-rate discharge bottles installed in a jet transport aircraft?
Halon 1211 or 1301
How is a high-rate discharge bottle of fire extinguishing agent discharged?
A powder charge is ignited and it blows a cutter through a frangible disk that seals the bottle
What precaution must be taken when checking the electrical circuit for igniting the powder charge in the valve of a high-rate discharge bottle?
The current used to check the integrity of the electric circuit must not be high enough to ignite the powder charge
What is indicated if the red discharge indicator for a fire extinguishing system is blown out?
The system has been discharged by an overheat condition
What is indicated if the yellow discharge indicator for a fire extinguishing system is blown out?
The system has been discharged by actuating the bottle discharge switch
What color and marking is used to identify the fluid lines that carry the fire extinguishing agent in an aircraft?
Brown tape with a series of diamonds on it
