Because fire is such a serious threat for aircraft, the potential fire zones of modern aircraft are protected by fixed fire protection systems. A fire zone is an area of an aircraft designed to require fire detection and/or fire extinguishing equipment and a high degree of inherent fire resistance. “Fixed” means that there is a permanently installed system, in contrast to any portable fire extinguishing equipment. A complete fire protection system will have both fire detection and extinguishing components.
Fire protection and detection systems are crucial in maintaining the safety of an aircraft and its passengers. These systems are designed to monitor conditions that could potentially lead to a fire within a vehicle, or within flight-critical components, such as the engines and hydraulic systems. Fire protection and detection systems include many components such as smoke detectors, heat sensors, and others.