Auto pilot sets crusing altitude a few feet higher than what atc asks for

Bug Reporting Hub Aircraft & Systems
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1

Ive never useda forum before, im sorry if this is the wrong format

The auto pilot keeps setting my cruising altitude a few feet higher than atc asks for and so atc keeps bugging me every minute or so to expedite descent.

Can anyone help me with this please

2

Hi TheBlackness

Just wanting to confirm a couple of things:

  • VFR or ILS flight?

  • What plane are you using?

Cheers

Ryvranth

3

make sure your baro is set. atc will provide or press B key to set for current area.

4

Im not sure what either of those are this is my firat time playing it. Im on xbox. Ive got the ai flying the plane thats all i know and its a 737

5

How do i set baro on xbox. Im in a 737

6

My map is vfr

7

For a 737 you will want to use an ILS flight plan not VFR.

If this is your first time in the Sim I recommend you start off with a Cessna C152 and learn instrument fundamentals before trying to operate a 737.

Go through the training tutorials, then fly around in the C152 for a while, then proceed to a C172 Skyhawk with a G1000 glass cockpit and after doing that for a while watch some video’s on operating a 737.

8

Ok i will do that but im already halfway across the atlantic in a flight that has taken me 4hrs. Is there anyway to fix this.

Thanks 4 the help

9

i actually have the same problem. altitude is set at 34k in auto pilot, altimeter 29.92. aircraft manages to FL340 but ATC keeps telling me to expedite climb. this is a new issue with SU5 and A32N

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10

What is su5 and a32n?

11

It’s been a issue for a while.
Especially on FBW A32NX, sometimes autopilot is not keeping the altitude very well.
It went higher little by little, then the warning beeps.

12

The reason is simply that the altitude calculation of MSFS is buggy. It fails calculating the correct pressure altitude and even indicated altitude when set to STD. That’s unfortunately the reason why altitude will jump when flying from one pressure zone to another. The real A320 as the A32NX store the current pressure altitude when ALT mode engages and then follows this value. This ensures that any baro setting change will not affect ALT mode at all after it has been engaged.

For the A32NX we tried a fix by deriving the altitudes from the ambient pressure directly and in regards to altitude and AP it was spot on then…but ambient pressure get’s updated quite less often than the rest and therefore it’s unusable for any autopilot to smoothly fly the plane.

Conclusion: there is currently no other way than it is now and the issue needs to be fixed in the sim.

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