

So it's seems like randomly it will work properly but most of the time it won't work properly for this route. Now recently I did another flight on the Zibo 737-800 but this time at 15,000 ft instead of 21,000 ft and it did start descending at the TD point but a few days ago I used this altitude as well for the same route and it did not start the descent at the TD point. I found out that setting the physical throttle on the joystick to idle after engaging auto throttle has does not resolve the issue.

Originally posted by djp_20:It also happens on the default 737-800 in X-Plane 11 as well. So why is the Zibo 737-800 and the default 737-800 aircraft not automatically descending at the TD point as shown on the instrument panel map on a few flight plans I created? I'm using the navigraph cycle that came with X-Plane 11 which is 1708 and not the latest navigraph cycle data from Navigraph. I did the same flight with the default 737-800 and it still won't descent for that flight plan at the TD point. I also set the departure runway for the departure airport using the FMC since there were no departure procedures shown for these airports in Little Navmap. I arm the altitude to 0 about 5 seconds after I reach cruising altitude on both flights. That cruising altitude for that flight was 38,000 ft.

I also did a flight from CYQR to CYZF and I had the same issue where the plane would not automatically descend at the TD point but I ended up manually descending on that flight. I created the flight plan using Little Navmap and imported the flight plan through the FMC. I noticed that when I did a flight from CYXE to CYQR in the Zibo 737-800, the plane will slow down once it's a few miles away from the TD point but it will not automatically TD point and start the descent once it's around 25 nm from touchdown which is way past the TD point.
