Airframe Volume 2: Systems Third Edition Aviation Maintenance Technician Series Dale Crane Chapter 13: Fire Protection Systems © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-1. A single-terminal bimetallic thermoswitch fire detector. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-2. Circuit for a single-terminal thermoswitch fire detector system. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-3. Circuit for a two-terminal thermoswitch fire detector system. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-4. A thermocouple fire sensor. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-5. A rate-of-temperature-rise fire-detection circuit. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-6. A single-conductor continuous-loop fire detector element. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-7. Single-conductor continuous-loop fire detection circuit. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-8. Two-conductor continuous-loop fire detector element. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-9. The operating principle of a Lindberg pneumatic fire detector. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-10. Operating principle of a Systron-Donner pneumatic fire and overheat detector. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-11. A photoelectric smoke detector allows a current to flow that is proportional to the amount of light refracted by the smoke particles in the detector chamber. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-12. Smoke in the detector chamber of an ionization-type smoke detector lowers the degree of ionization and decreases the current flowing to the external circuit. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-13. Visual-type smoke indicator allows the flight engineer to actually observe the air sampled from a compartment for traces of smoke. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-14. A typical HRD container for protecting an engine compartment. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-15. Engine fire extinguishing-overheat fire protection panel A. Engine detector FAULT light (amber) B. Fire warning BELL CUTOUT switch C. ENGINE BOTTLE DISCHARGED lights (amber) D. EXTINGUISHER TEST switch E. EXTINGUISHER TEST lights (green) F. APU FIRE WARNING switch (red) G. APU DETECTOR INOP light (amber) H. APU BOTTLE DISCHARGED light (amber) I. ENGINE FIRE WARNING switch (red) (2) J. FAULT/INOP and OVHT/FIRE test switch K. ENGINE OVERHEAT light (amber) (2) L. ENGINE OVERHEAT DETECTOR switch (2) M. WHEEL WELL FIRE WARNING light (red) © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-16. Engine fire detector element. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-17. APU fire extinguishing ground control panel A. APU FIRE WARNING horn B. APU HORN CUTOUT switch C. APU FIRE WARNING light D. APU fire control handle E. BOTTLE DISCHARGE switch © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-18. Cargo smoke detection and fire suppression panel. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 3-19. Lavatory smoke detector control panel. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-20. Typical fire-detector loop clamp showing the correct way of installing the grommet. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-21. Correct attachment of a fire-detector loop to the aircraft structure. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems

Figure 13-22. Fire extinguisher pressure/temperature chart. © 2009 Aviation Supplies & Academics, Inc. All Rights Reserved. Aviation Maintenance Technician Series: Aiframe Volume 2: Systems