A320 sinking on approach after update? Not staying at requested altitude

Hi,

Always used ILS following ICT instruction or checking the CSTR, never had a problem until the latest update. It’s happening like this (I am no expert so bear with me): I usually intercept the G/S at 3,000, all ok during cruise, ap1 and auto throttle. Approaching I activate LS to see the pink squares. I start descending (example: from 10,000 to 5,000). It keeps happening that after the update, NEVER DONE IT BEFORE, the plane does not keep the altitude selected. For example I select 3,000, reaches 3,000 and does not stop, keep sinking, elevator moving like crazy, nose pitching up. Then it is very difficult to save the plane from crash. If I can save the plane, then no issues with the GS and landing. Maybe I am doing something wrong (not a barometer issue as I tried also with preset weather), but what I am doing is exactly what I have been doing successfully for the last months! Anybody can help me?

Sounds like you are slowing down too much. What’s your speed when this happens?
Thrust levers are in the climb detent?

Hi, thanks for replying.
It’s around 220 I think. Yes the thrust is in CL. It’s usually going down at approx 2, 2.5 VS. I never had a problem before, when I reach a low altitude before ILS (for example 3,000) I activate the flaps, I slow down to 180-140, get the GS and done. But now, I select the altitude and the plane does not stop, keeps sinking. Thanks for you help.

Are you flying managed or selected speed?
Are you in clouds when this happens? (icing)

Always used managed. It happened during 3-4 approaches after the update with different weather conditions.

Weird. Can you post a panel screenshot when this happens?

Will do! Thanks a lot

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@PZL104 Here it is: I was at 12,000, ATC told me to go to 9,000 which makes sense checking also the CSTR. Clicked 9,000, managed altitude (upper arrow on knob), plane started descending smoothly, then did not stop at 9,000, actually increased even more the vertical speed. I crashed it :-).
Again, never happened to me before the update, and all the previous changes of altitude worked perfectly, it always happens when I start approaching (somewhere around the decel). Maybe from the screenshot you spot something? Cheers

That’s one of the few panelscreenshots were really everything seems to be correctly set up :+1:

It makes no sense that while the speed seems to be sufficient, the AP doesn’t follow it’s own FD commands and speed and vertical speed increase.

1.You might be picking up ice. MSFS only simulates severe icing which occurs very rapidly.
Switch to the external view and check if your A320 is covered in ice.
If that’s the case, turn on wing and engine anti-ice, switch to selected speed and increase speed to 250kts. (Once the ice is gone you can switch to managed speed again).

2.Unlikely, but you should check if the flight model is (still) set to MODERN.

3.What is the stab trim setting when this happens and what’s the CG?

4.Since the framerate of the FBW A320 is even a tad better than the default A320s (at least on my PC), suggest to use their version. Highly recommended.
Especially since it’s obvious that you know how to operate an A320.

Managed modes are not very reliable in this sim, I’d suggest to use either open descent (bottom of the knob) or vertical speed.
I have no such problem with the 32NX from flybywire but I remember when I was using the default 32N I had a similar issue and solved it like that

@PZL104 Many thanks, your help is much appreciated.

  1. The A320 was covered in ice. I never turned on wing and engine anti-ice as I chose the setting icing - visual only, so I did not bother. Do you think this matters? However, I will have the next flights with de icing on and see what happens.
  2. I am going to check that next time I play.
  3. I do not know what you are referring to, sorry, I am completely new to flight sims (even though the plane never sunk like this before the update!).
  4. I heard about it, is it a different airplane? Where and how can I download it?

@RuinedParsley22 Hi and thanks. I am going to try first what suggested by PZL104. If nothing happens I’ll try to use the open descent instead of the managed one. Do you suggest to use the open descent for the entire flight or only at approach where I encounter the problem? (Because with the managed mode I do not have any issue in take off - reaching cruise etc.).
I have asked PZ104 where and how to install this flybywire in case my problem persist.

The stabilizer trim position is depicted on the green scale next to the large black & white trim wheels.

CG is the center of gravity. When you open the weight and balance window it’s on the right side, but you have to enlarge the window to be able to see it.

There are conflicting reports concerning the icing simulation.
I’ll test that ASAP.

I’d say you may use it just for the approach itself. Keep in mind that in real life it doesn’t happen very often to fly an entire approach in managed mode, because of shortcuts, vectors and so on. Most often we play with open descent (level change in Boeing planes) and vertical speed to fine tune the descent