As can be seen from the name, the fire protection system pays more attention to the word "prevention". In fact, there is also a fire extinguishing system on the plane, but it belongs to a subclass of fire prevention system. After all, the function of fire extinguishing system alone is limited.
For aircraft, the detection system is not as simple as everyone thinks. In addition to smoke detection, there will be a variety of detection instruments such as fire alarm and overheating, which are distributed in various important parts of the aircraft. The fire extinguishing agent here is generally nitrogen or halogenated hydrocarbon and other substances that can isolate combustion.