What happens when the autothrottle is disengaged regarding Guard protection?

When the autothrottle is disengaged, Guard protection is not active. This means that the system designed to monitor and protect the engine from exceeding certain operational parameters will no longer be in effect. Guard protection typically functions to ensure the engine operates within safe limits by automatically adjusting thrust as required.

Once the autothrottle is turned off, pilots have to manage throttle settings manually, which eliminates the safeguard that the autothrottle would provide. As a result, it becomes crucial for pilots to maintain appropriate power settings to prevent engine over-revving or other potentially damaging conditions.