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Diamond DA42 ECU Swap Switch

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What these two switches for?  I know that ECU stands for Engine Control Unit but  I have no idea what these are used for!

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Basically the switch switches between the two ECU systems for checking during the run-up. Think of them as the Mag Check (1 and 2 - On/ Off - watch for the rev drop)

In flight the DA-42 will switch if the ECU 1 fails to ECU 2 so it parts company with the Mag similarity at that point.

More info here:


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