Flashcards on Aircraft Engine Fire Systems
Aircraft Engine Fire Systems: Detection, Extinguishment & Operation
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Aircraft Engine Fire Detection and Suppression
9 cards
Card 1
Question: What are four types of engine fire detection systems?
Answer: Thermoswitch (thermal switch) system; thermocouple system; thermistor-type continuous-loop system; pneumatic-type continuous-loop system.
Card 2
Question: Can a thermal switch (spot-type) fire detection system indicate a general overheat condition?
Answer: No. It is a spot-type system and cannot indicate a general overheat condition.
Card 3
Question: Can a thermocouple-type fire detection system indicate a general overheat condition?
Answer: No. It is a rate-of-temperature-rise system and cannot indicate a general overheat condition.
Card 4
Question: How is a thermocouple-type fire detection system checked for operation?
Answer: (No answer provided in the source material.)
Card 5
Question: If a continuous-loop fire detection system has a break, will it still detect a fire?
Answer: Yes. A break will show a fault when tested, but the unit will still warn of a fire.
Card 6
Question: Does the pneumatic-type continuous-loop fire detector detect general overheat as well as fire?
Answer: Yes. A high temperature on a small portion of the sensor or a lower temperature over the entire sensor will release enough gas to close the diaphragm
Card 7
Question: What are the two most used fire extinguishing agents for engine fires?
Answer: Halogenated hydrocarbon (such as Halon 1301) and carbon dioxide (CO2).
Card 8
Question: Which extinguishing agent is used in the high-rate discharge systems in most turbojet engine installations?
Answer: Halon 1301.
Card 9
Question: What happens when the pilot pulls the fire-pull T-handle in the flight deck of a jet aircraft?
Answer: The bottle discharge switch is uncovered and armed; the generator field relay is tripped; fuel is shut off to the engine; hydraulic fluid is shut off