Not sure if it's been reported. After MSFS SU10 update, the NAV/GPS button of the C172 (above VOR1) won't toggle the status of NAV and GPS on the VORs as well as on the GNS530/430.

In order to change the status of NAV and GPS on the VORs, one has to press the CDI buttons on the GNS530 and 430 respectively.

The issue seems valid on the C172 only.    Tested other aircraft (either default or payware) and they don't have such issue.

 

Edited October 2, 20223 yr by Tom Tsui

8 hours ago, Tom Tsui said:

In order to change the status of NAV and GPS on the VORs, one has to press the CDI buttons on the GNS530 and 430 respectively.

This may actually be true to life. A fix, not a bug.. 😉

Sorry, if that is so, what's the use of the NAV/GPS button ?   

The NAV/GPS button has been used on FSX, prepar3D and X-Plane (and MSFS before SU10) to toggle the NAV and GPS status.  Now, it is "fixed" to change the  lights of the button only ?

 

Edited October 3, 20223 yr by Tom Tsui

5 hours ago, Tom Tsui said:

Sorry, if that is so, what's the use of the NAV/GPS button ?   

The NAV/GPS button has been used on FSX, prepar3D and X-Plane (and MSFS before SU10) to toggle the NAV and GPS status.  Now, it is "fixed" to change the  lights of the button only ?

 

I agree that it is not elegant, and you would have to look at the real airplane to see how it is wired up.

Most Garmin GPS units that I am familiar with, expect you to switch GPS/VLOC mode by toggling the CDI button on the GPS.  The NAV/GPS button is more of an indicator than a toggle button..

If I remember correctly, the P3D GPS units could have this set as master or slave... which is probably what you are after.

Are you using the PMS50 GNS530? If so, contact the author and see if there is an option to select your preference..

Edited October 3, 20223 yr by Bert Pieke

6 hours ago, Tom Tsui said:

Sorry, if that is so, what's the use of the NAV/GPS button ?   

The NAV/GPS button has been used on FSX, prepar3D and X-Plane (and MSFS before SU10) to toggle the NAV and GPS status.  Now, it is "fixed" to change the  lights of the button only ?

 

I see the same thing and have to think it is a bug. Would be "dangerous" for the panel light to indicate one mode when the GPS was actually in the other. I just have the default GPS units installed in the C172 so it's not a PMS50 issue.

Al

Edited October 3, 20223 yr by ark

33 minutes ago, ark said:

I see the same thing and have to think it is a bug. Would be "dangerous" for the panel light to indicate one mode when the GPS was actually in the other. I just have the default GPS units installed in the C172 so it's not a PMS50 issue.

Al

I do not have the airplane so cannot compare, but Al, you are introducing an additional issue... the NAV/GPS light and the GPS mode on the Garmin disagreeing.. If that is the case, it would be a bug.

Up to this point we were only talking about a Master/Slave question..

52 minutes ago, Bert Pieke said:

I do not have the airplane so cannot compare

Bert,

Here is what can happen since the NAV/GPS panel button has no effect on the GPS units in SU10.

Al

Edited October 3, 20223 yr by ark

39 minutes ago, ark said:

Bert,

Here is what can happen since the NAV/GPS panel button has no effect on the GPS units in SU10.

Al

 

Yup.. that is no good (and would be easy to fix..) 😉

44 minutes ago, Bert Pieke said:

(and would be easy to fix..) 😉

... except I think some of the key files for this plane are encrypted. 🤔

Al

Edited October 3, 20223 yr by ark

Just now, ark said:

... except I think some of the files for this plane are encrypted. 🤔

Al

I meant for the original authors it would be easy... for us "Users".. it may well be impossible.. 😉

3 minutes ago, Bert Pieke said:

I meant for the original authors it would be easy... for us "Users".. it may well be impossible.. 😉

I don't fly this plane, but I'm sure a lot do, so hopefully the OP will report the bug to Asobo for a SU11 fix.

Al

Because the mini-panel on the 172 Classic would have been originally used in conjunction with a KLN89 or 94 GPS, it can't be wired to a GNS unit. Therefore it was changed to what the most likely wiring of that mini-panel would be with the attached equipment, if the owner had not replaced the mini-panel, which is that the mini-panel controls the autopilot source (GPS1 or NAV1), and the CDI buttons on each GNS unit independently control the CDI display source.

1 hour ago, MattNischan said:

Because the mini-panel on the 172 Classic would have been originally used in conjunction with a KLN89 or 94 GPS, it can't be wired to a GNS unit.

Hi Matt,

I don't understand the above statement. I would expect that when the C172 panel was upgraded to the GNS units a good avionics shop could figure out how to interface the panel NAV/GPS button to the GNS 530 if the plane's owner was willing to pay for what it would take to do it.

But that aside, the current configuration strikes me as bad human factors engineering. Having the mini-panel indicating GPS and the GNS 530 VLOC seems like an accident waiting to happen. If it was my plane I would rather have the mini-panel INOP.

Al

Edited October 3, 20223 yr by ark

2 hours ago, MattNischan said:

Therefore it was changed to what the most likely wiring of that mini-panel would be with the attached equipment, if the owner had not replaced the mini-panel, which is that the mini-panel controls the autopilot source (GPS1 or NAV1), and the CDI buttons on each GNS unit independently control the CDI display source.

Now I am really confused.. NAV1 is the radio in the GNS unit, is it not?

Here is the a2a C182 in P3D... the NAV/GPS light works and is slaved to the GPS CDI button.

The NAV/GPS button is inop.

Edited October 3, 20223 yr by Bert Pieke

Yep. This is an issue I came across post SU10.  It's not right at all.  I can't believe you can get such contra indications in the real aircraft.

I've got used to it now, but it's not the way it should be.