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In a quadruplex system, when does a passive fail situation occur?

In a quadruplex system, when does a passive fail situation occur? Correct Answer When 2 channels fail none is disconnected

When two channels fail and are not disconnected, two good channels versus two failed hard over channels so that the control surface does not move resulting in a ‘fail passive’ situation. When one channel fails and is not disconnected, the other three good channels overrides the failed one.

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