AMP - Aviation Maintenance Technician Powerplant Practice Exam

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Prepare for the Aviation Maintenance Technician Powerplant Exam with comprehensive flashcards and multiple choice questions. Equip yourself with detailed explanations and tips to succeed.

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When a magneto is operating, what is the probable cause for a shift in internal timing?

The rotating magnet loses its magnetism.
The distributor gear teeth are wearing on the rotor gear teeth.
The cam follower wear and/or the breaker points wear.
Magnetic flux inconsistency

The correct answer is: The cam follower wear and/or the breaker points wear.

When a magneto is operating, a common cause for a shift in internal timing is wear on the cam follower and/or the breaker points. This can result in the timing becoming inaccurate, leading to a shift in internal timing. The other options are incorrect because they do not directly relate to the functioning of a magneto, and therefore would not be considered probable causes for a shift in internal timing. Option A is incorrect because the rotating magnet losing its magnetism would not affect the timing mechanism. Option B is incorrect because it refers to the distributor and rotor, which are not part of a magneto. Option D is incorrect because it does not specifically address the functioning of a magneto or its timing mechanism.