Like another person said it bypasses the fuel controller and the fuel is used by the engine dependent upon how much the lever is moved. It’s about like pouring a bucket of gasoline on a fire if you’re not careful. I did a video on the TBM that covers everything inside the cockpit including that mysterious red lever. The COMPLETE TBM 930 Tutorial - All Buttons And Switches Microsoft Flight Simulator - PC and XBOX - YouTube
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