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787-800 VNAV Not working


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My flight plan with VNAV and LNAV guidance is properly set up in the MCDU as far as I can tell.  And LNAV and VNAV are on and correctly guide the aircraft to cruising altitude and hold it there.  However when it's time to descend, nothing happens - the aircraft simply continues at cruise altitude.  The TOD symbol comes and goes, but no descent.  Waypoints with altitude restrictions come and go - no descent.  I've included screenshots.  Looking for ideas.  I've tried this about 5 times now with the same result.  

X-Plane Screenshot 2022.06.10 -

X-Plane Screenshot 2022.06.10 -

X-Plane Screenshot 2022.06.10 -

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