Aviation Mechanic - General, Airframe, and Powerplant › III. Powerplant › Task H. Ignition and Starting Systems

AM.III.H.K9

Knowledge

Turbine engine ignition systems.

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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. 4-43
Chapter 4: Engine Ignition & Electrical Systems › Turbine Engine Ignition Systems
Other modes of turbine ignition system operation, such as continuous ignition that is used at a lower voltage and energy level, are used for certain flight conditions. Continuous ignition is used in case the engine were to flame out. This ... turbine engines are equipped with a high-energy, capacitor-type ignition system and are air cooled by fan airflow. Fan air is ducted to the exciter box, and then flows around the igniter lead and surrounds the igniter before flowing…
Aviation Maintenance Technician Handbook - Powerplant p. 4-45
Chapter 4: Engine Ignition & Electrical Systems › Turbine Engine Ignition Systems › Igniter Plugs
Igniter Plugs The igniter plug of a turbine engine ignition system differs considerably from the spark plug of a reciprocating engine ignition system. [Figure 4-75] Its electrode must be capable of withstanding a current of much higher energy than ... typical annular-gap igniter plug, sometimes referred to as a long reach igniter because it projects slightly into the combustion chamber liner to produce a more effective spark. Another type of igniter plug, the constrained-gap plug, is used…
Aviation Maintenance Technician Handbook - Powerplant p. 4-44
Chapter 4: Engine Ignition & Electrical Systems › Turbine Engine Ignition Systems › Capacitor Discharge Exciter Unit
This capacity-type system provides ignition for turbine engines. Like other turbine ignition systems, it is required only for starting the engine; once combustion has begun, the flame is continuous. [Figure 4-74] The energy…
Aviation Maintenance Technician Handbook - Powerplant p. 5-9
Chapter 5: Engine Starting Systems › Gas Turbine Engine Starters
used to start gas turbine engines by using the combustion energy of jet A fuel and compressed air. The starter consists of a turbine-driven power unit and auxiliary fuel, air, and ignition systems. Operation of this type ... smaller engines. Many of these systems are not often used on modern commercial aircraft because of the high power demands required to turn the large turbofan engines during the starting cycle on transport aircraft. Electric Starting Systems & Starter…