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  • Chapter 9: Engine Fire Protection Systems › Introduction › Engine Fire Detection Systems

    weight and easily adaptable to any mounting position. 9. Detector circuitry that operates directly from the aircraft power system without inverters. 10. Minimum electrical current requirements when not indicating a fire. 11. Each detector system should turn on a flight ... deck light, indicating the location of the fire, and have an audible alarm system. 12. A separate detector system for each engine. Engine Fire Detection Systems Several different types of fire detection systems are installed in aircraft to detect engine…

  • Chapter 17: Fire Protection Systems › Cargo & Baggage Compartment Fire Detection & Extinguisher System › Smoke Detector System

    Smoke Detector System The optical smoke detector consists of source light emitting diodes (LEDs), intensity monitor photodiodes, and scatter detector photodiodes. Inside the smoke detection chamber, air flows between a source LED and a scatter detector photodiode. Usually, only ... small amount of light from the LED gets to the scatter detector. If the air has smoke in it, the smoke particles reflect more light on the scatter detector. This causes an alarm signal. The intensity monitor photodiode makes sure…

  • Chapter 17: Fire Protection Systems › Fire Detection System Maintenance

    Push the lavatory call reset switch or the smoke detector interrupt switch to cancel the smoke indications. If there is still smoke in the lavatory, the alarm LED (red) stays on. All smoke indications go away automatically when the smoke ... gone. Figure 17-21. Cargo and baggage compartment extinguishing system. Figure 17-22. Lavatory smoke detector diagram. Lavatory Fire Extinguisher System The lavatory compartment is outfitted with a fire extinguisher bottle to extinguish fires in the waste compartment. The fire…