AM.III.E.S2
SkillIdentify fire detection sensing units.
From the FAA library
- Chapter 17: Fire Protection Systems › Continuous-Loop Systems › Kidde System
control unit. As the temperature of the core increases, electrical resistance to the ground decreases. The fire detection control unit monitors this resistance. If the resistance decreases to the overheat set point, an overheat indication occurs in the flight deck ... resistance identifies an electrical short or a fire. The resistance decreases more quickly with an electrical short than with a fire. In some aircraft, in addition to fire and overheat detection, the Kidde continuous-loop system can supply nacelle temperature…
- 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 locks…
- Chapter 9: Engine Fire Protection Systems › Boeing 777 Aircraft Fire Detection & Extinguishing System › Engine Fire Operation
Deenergizes the engine fuel metering unit (FMU) cutoff solenoid. • Closes the engine hydraulic pump shutoff valve. • Depressurizes the engine driven hydraulic pump valve. • Closes the pressure regulator and shutoff valve. • Removes power from thrust reverser isolation valve. • Trips the generator ... field. • Trips the backup generator field. [Figure 9-27] Figure 9-24. Location of fire extinguishing bottles. Figure 9-25. Squib or cartridge. Figure 9-26. Fire switch. Engine Fire Operation If an engine has a fire, the engine fire…