Question

When using a timing light to time a magneto to an aircraft engine, the magneto switch should be placed in the _______ position.

Answer 1

When timing a magneto to an aircraft engine using a timing light, the magneto switch should be placed in the Off position to prevent accidental engine firing.

Step-by-step explanation:

When using a timing light to time a magneto to an aircraft engine, the magneto switch should be placed in the Off position.

This is done to ensure that the engine does not start while timing the magneto. By placing the magneto switch in the Off position, the ignition circuit is effectively disconnected, preventing any accidental engine firing during the timing process.

Once the timing is correctly set, the magneto switch can be returned to the On or Run position for normal engine operation.