There are several different types of fire detections systems used to detect engine fires on aircraft. Two of the most common types used are spot detectors and continuous loop systems. Spot detector systems use individual sensors to monitor places in which fire could occur. Some examples include the thermal switch system, the thermocouple system, the optical fire detection system, and the pneumatic-based thermal fire detection system. By contrast, continuous loop systems provide more completed fire detection coverage by using several loop-type sensors. As such, they are more often used on transport-type aircraft that require greater supervision.
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