Aviation Mechanic - General, Airframe, and Powerplant › II. Airframe › Task M. Airframe Fire Protection Systems

AM.II.M.S7

Skill

Locate and explain the procedures for inspecting an overheat detection system.

Study note

Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

From the FAA library

Aviation Maintenance Technician Handbook - Powerplant p. 9-1
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…
Aviation Maintenance Technician Handbook - Powerplant p. 9-4
Chapter 9: Engine Fire Protection Systems › Engine Fire Detection Systems › Continuous-Loop Detector Systems
Fenwal system may be wired to employ a “loop” circuit. In this case, should an open circuit occur, the system still signals fire or overheat. If multiple open circuits occur, only that section between breaks becomes inoperative. Kidde Continuous-Loop ... System In the Kidde continuous-loop system, two wires are imbedded in an inconel tube filled with a thermistor core material. [Figure 9-5] Two electrical conductors go through the length of the core. One conductor has a ground connection…
Aviation Maintenance Technician Handbook - Powerplant p. 9-17
Chapter 9: Engine Fire Protection Systems › APU Fire Detection & Extinguishing System
Fire Detection & Extinguishing System The APU fire protection system is similar in design to engine fire protection systems, but there are some differences. The APU is often operated with no personnel in the flight deck ... fire protection system can operate in an unattended mode on the ground with the engines not running. If there is an APU fire in the unattended mode, the fire extinguisher discharges automatically. The APU operates in the attended mode…
Aviation Maintenance Technician Handbook - Powerplant p. 9-16
Chapter 9: Engine Fire Protection Systems › Boeing 777 Aircraft Fire Detection & Extinguishing System › Engine Fire Switches
Engine Fire Switches The engine fire panel is in the flight deck on the P8 aisle stand. The engine fire panel has a fire switch for each engine and a discharge light for each fire bottle. [Figure ... engine fire switch has four functions: Gives an indication of an engine fire, • Stops the engine, • Isolates the engine from the aircraft systems, and • Controls the engine fire extinguishing system. The fire switch assembly incorporates a solenoid that…