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

AM.III.H.S8

Skill

Inspect a magneto impulse coupling.

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. 4-20
Chapter 4: Engine Ignition & Electrical Systems › Auxiliary Ignition Units › Impulse Coupling
disadvantage, especially during adverse starting conditions. Even with these disadvantages, the impulse coupling is still in wide use. Figure 4-33. Parts of an impulse coupling. High-Tension Retard Breaker Vibrator To provide for more spark power during the starting ... These units are mounted on a base plate and enclosed in a metal case. Figure 4-34. Impulse coupling on a magneto. Figure 4-35. Flyweights engage stop pins…
Aviation Maintenance Technician Handbook - Powerplant p. 4-31
Chapter 4: Engine Ignition & Electrical Systems › Checking the Internal Timing of a Magneto › Maintenance & Inspection of Ignition Leads
Maintenance & Inspection of Ignition Leads Inspection of ignition leads should include both…
Aviation Maintenance Technician Handbook - Powerplant p. 4-10
Chapter 4: Engine Ignition & Electrical Systems › Magneto Mounting Systems › High- & Low-Tension Magneto Systems
Magneto Mounting Systems Flange-mounted magnetos are attached to the engine by a flange around the driven end of the rotating shaft of the magneto. [Figure 4-19] Elongated slots in the mounting flange permit adjustment through a limited range ... timing the magneto to the engine. Some magnetos mount by the flange and use clamps on each side to secure the magneto to the engine. This design also allows for timing adjustments. Base mounted magnetos are only used on very…