RNAV approach - not descending on the VGP

[globenomaden]

Hi,

I flew an LOWS RNAV 33Y approach, after WS 834 it should descend on an 3 degree descent path. But nothing happend, the CL did not descend (path and GP in white armed but stayed on 5000 feet (see screemshot).

What was the problem ?

 

[Pils]

We would need to see the state of the aircraft before reaching the approach. Maybe try again but this time recording a screen capture on video? Thanks.

[globenomaden]

Thanks for your support. I tried the sme approach again, same result. After the 5000 constraint at Ws834 no descent. See the picture before and after reaching IAF at WS 831

[Pils]

Ok, you need to keep going with the periodic screenshots from levelling off at 5000 until after the descent is meant to start at 834.  

[globenomaden]

Something is wrong with this approach, because the system vertical deviation shows way up to high for the desired descent path which is wrong as we are perfect on the path. Thanks again for checking.

[N53E]

I thought this was something I was doing wrong. Having the same issue.  Setting up RNAV (RNP) Z RWY 14 at KPBI.  In fact, on approach the AP turned right off course; had to be a pilot and fly approach. The only RNAV approach that works sometimes for me is the GPS approach. I normally use ILS. When I entered the approach information in PERF and hit send, I immediately got message VSPEED DISAGREE and a yellow VSPD on PFD.

[Pils]

2 hours ago, N53E said:

I thought this was something I was doing wrong. Having the same issue.  Setting up RNAV (RNP) Z RWY 14 at KPBI.  In fact, on approach the AP turned right off course; had to be a pilot and fly approach. The only RNAV approach that works sometimes for me is the GPS approach. I normally use ILS. When I entered the approach information in PERF and hit send, I immediately got message VSPEED DISAGREE and a yellow VSPD on PFD.

Do you have a thread about this?

[Pils]

On 8/5/2023 at 3:41 AM, globenomaden said:

Something is wrong with this approach, because the system vertical deviation shows way up to high for the desired descent path which is wrong as we are perfect on the path. Thanks again for checking.

Ok, I'll add it to my list to try on the beta version. May already be working there.

[globenomaden]

I tested again with an NDB approach SETU NDB 24. Before IPI 07 I am perfect on path, short after passing IPI 07 also, but then instead of descending to FF24, it began to climb and climb and did not stop. It changed to Vptch and FMS message NO VPATH-TKE. There is also the RWY as the final WP missing. Because after TLC there is the first missed approach WP. For me it seems if there is no steight in path to the RWY the VGP will not work.

Edited August 7, 2023 by globenomaden

[N53E]

15 hours ago, Pils said:

Do you have a thread about this?

I do not. Just search for what I'm looking for.