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RNAV Approaches


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Hello Guys,

Ive seen an old thread about this topic but closed now.

Ive been trying to fly three RNAV approaches up till today, one successful but two without success.

Initialy though I was missing something as in the company I fly for we dont fly RNAV approaches. I revised the procedure again from the normal procedures in the FCOM.

I would like to see if anyone have issues with RNAV approaches.

Thank you all in advance.

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Of course.

First I believe RNV APP should appear at the top of ND.

The FINAL APP become armed when I arm the APPR but over the FInal Descend Point aircraft should start the descend and activate FINAL APP and nothing happens.

Is this working properly at your side?

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why arm the APP button? thats for ILS arrivals using a glideslope. your RNAV will have its own decent profile down to Minimums.

Hello Matty,

Thank you for your feedback.

As mentioned above I dont fly RNAV approaches as Ive not been certified for that, all my information is based on FCOM normal procedures and from there you do need to ARM APPR for RNAV approaches.

Btw, Arming APPR is not only used for Precision approaches as you mentioned but also used for Non Precision Approaches in case you fly both profiles managed.

Thank you.

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why arm the APP button? thats for ILS arrivals using a glideslope. your RNAV will have its own decent profile down to Minimums.

That's only correct for Boeing aircraft, in Airbusses APPR activates the approach mode for all kind of approaches.

Just like Boeing does with LNAV/VNAV in Airbusses there is FINAL APP mode which will follow the profile below the selected FCU altitude.

It's comparable to IAN approaches in a 737 if you're more used to Boeing aircraft.

No one is having the same issues?

RNV APP is an indication by an older Airbus software revision. In the one we model it should display RNAV xx (xx being the runway number) if I'm not mistaken.

I didn't have problems flying RNAV approaches so far, but I'll do some checks over the weekend.

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  • Deputy Sheriffs

Basicly the same as this thread: (also started by you)

http://forum.aerosoft.com/index.php?/topic/95269-non-precision-approach-managed/

Fully managed NPA's are flown the same as RNAV's.

ps, the bus has RNVxx in it's ND. This has already been forwarded to the dev to be changed.

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Hi Frank,

Thanks for your feedback.

Ive decided to open separate thread since RNAV and fully managed NPAs are different approach types that require different minima criteria. For example the minimum GPS accurancy needed is different.

Also for managed NPAs you also confirmed sometimes it doesnt work at your side and I believe the developers are investigating. Does this mean you also got problems with RNAV approaches?

Thank you so much for your time.

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  • Deputy Sheriffs

Hi, the approaches are the same from a procedural point of view but it is a good thing to post the issues seperate.

Sometimes they work for me, sometimes not. I did not find out what causes the unusual behaviour. One important thing is that the FAWP has to have an altitude constraint and you should be at this altitude when overflying it.

Be aware that fully managed approaches are not "fully" modeled in this product due to, among others, the database that is used. This database has not all the data needed for a 100% realistic simulation. One of the items missing is the vertical profile between the FAWP and the MAWP for example.

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Ok clear. So its not only at my side that these approaches doesnt work sometimes.

Understand also for fully managed NPAs that some profiles are missing but the ones I tested Ive matched against real Jeppesen charts to make sure the profiles are there.

Ive not even created the profiles myself as in real life you are not allowed for that in a fully managed approach.

Would also be intrested to know what are the developers looking forward on this issue and if there is space for improvement in a future release.

Thank you once again for this product which Im very happy with, just trying to make it better and better.

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  • Deputy Sheriffs

You can not enter a vertical profile in this product and also not in the RW. I am not talking altitude constraints here but "slopes", like 3 degrees with a standard ILS. As a real Airbus pilot you should have noticed the missing line in the MCDU FPLN pages. ;)

I also talked to the dev and almost nothing can be done here. :(

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Yeap indeed have noticied that. It was definetely the first thing I saw missing when I performed the first NPA when was fixing the VAPP at the FAF.

Ok I understand :( you guys can only do what can be done.

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