I finally found the cause. The TBM 850 integration was working correctly. The issue was caused by a PMS50 GTN750 option. In the integrated cockpit GTN750, System → Setup → Options → VCALC was enabled. This option forces the VCALC page to be displayed instead of the VNAV page. After disabling it, VNAV Profile immediately became available in the cockpit GTN as well. So this was a layer-8 configuration issue, not a problem with the Black Square TBM 850. I sincerely apologize for posting this in the TBM forum. Thank you for your patience and for reading through my overly complicated investigation. Greetings from Berlin! Kai! P. S.: She's a beauty [image: aa312330-8d97-4f61-9beb-c7aeebf90e11.png]

Interesting... The only thing the defroster does is turn on the windshield deice, so I suspect Asobo considers the "melt system" (as it's called in the material parameters) to include the windshield deice, even though the windshield is a different material... I've made the appropriate change now and will see if it makes a difference. If you haven't noticed, the icing features in MSFS were not very well thought out, in my opinion.

@rinkerbuck said in Holding the localizer: well RNAV approaches don't have localizers, so I'm questioning what you're actually doing when this is happening. Also what avionics options, what radio stack setup are you using? I am using the STEC autopilot with a TDS GTN750. Maybe I should have used quote marks around the term "Localizer".. I meant zig zagging along the lateral track on final. Airspeed around 90 knots with one or two notches of flaps and gear out..

Have you tried using Pop Out Panel Manager (a free utility on flightsim dot to)? It pops out windows and allows you to size them as you wish. Highly recommended, I pop out windows for most of my planes using it.

This could be a Navdata issue with your TDS or PMS GTN750. Do you have any other planes that use the same unit, and if so can you reproduce this same issue there?

Hi, I have a question. Can you tell me if you're developing both the Beechcraft 1900D and Beechcraft 1900C for both MSFS 2020 and MSFS 2024? Thank you so much for your help. Sincerely, Connor Richey

@Hoff_Flight Ah, thank you for the suggestion. That might have been what it was last time I heard about it too, and I just got tickets mixed up in my head. Thanks.

It truly is weird, it looks like it doesn't happen every time, or at least I don't always notice it, but when this happens, there usually isn't much noise since the plane is in cold and dark, so it's easy to spot.

@Black-Square ooh... good to know. Thanks!

@Episcopale Thanks for lettting everyone know. I used to hear about that years ago, but I figured it had works its way off most people's systems by now. Let me know if there is ever anything else I can do for you!

@Black-Square Im jumping between fs20 and fs24 depending how broken fs24 is recently on xbox x. 2. I think I messed fuel quantity after systems stsrtup. On the secon try the amount of Fuel in fms progress was ok. 3. I suppose it is impossible to keybind ALI850A alt knob in xbox msfs 20, isnt it? I didn't check fs24 yet.

I'm pretty sure that's the only step you would need to take, yes.

Makes sense, thanks for the answer.

That makes sense, thanks for your quick response.

@daifuco Many thanks for the kind words and appreciation! Even with being partially deaf it’s amazing to hear how it has changed your experience for the better.

Had the same today. After disconnecting the EXT Power, it still remains available.

i recently got a new PC (AMD 9950X3d2, 64GB DDR5-6400 RAM, RTX 5090) and on this new system i also have these very subtle periodic microstutters every second like before. fresh system, no other software except for windows and flight sim. it's very subtle so maybe a lot of people don't notice it and it varies in intensity. sometimes it's gone, then it comes back. basically i just use MSFS 2024 ultra settings. nothing changed from these settings. and like before, only with black square aircraft (in this case i only tested the TBM unlike last time)