Been flying TBM930 a lot recently with multi-leg flights.
I start from cold and dark, set everything up, then the nav works fine on that first leg.
I land, shutdown the engines.
I then start them up again, double check AP/Trim is enabled, setup my flight plan, ensure nav is set to FMS. At this point it stops working every time. I need to reload the plane for it to start working again.
I’ve noticed 2 things with this issue:
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AP can be set to on, with a flight plan and the correct leg selected, then I enable NAV and the plane just circles constantly. Never goes to the track line.
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Again the same, but instead NAV just doesn’t enable. This one seems rare but I did my checks and im pretty sure everything was setup as it should be.
I’ve also tried starting normally (not cold and dark) with the same issue. As soon as engine off, then back on, NAV breaks.