Following the most recent mandatory update I have had trouble losing the GPS tracking on RNAV approaches while flying the TBM,CJ4 and King Air.
I load the entire flight through the World Map which I have done for over 100 hours of IFR flying without issues until recently.
I will load the flight plan through the World Map.Following take off all seems to be going to plane however once I get to the Transition to the RNAV approach the planes will stop following the flight plane and begin to fly on itās own.
I have done several uninstall and reinstall without much change.
Prior to the update I was having zero issues with any RNAV approaches.
I use a pc and I get MSFS through Steam.
Any and all recommendations are welcome.
Thanks in advance.
Iāve been testing various approaches with the TBM without issue for the most part. Can you post the flight plan that youāve had an issue with? (not the .FLT or .PLN, just the departure/arrival airport, and and departure/arrival routes, and which RNAV approach you set up) and Iāll see if thereās an issue with the sim, or if the newer AAU1 procedures may be causing the problem.
Regards
Do ILS approaches work OK?
Hey @NightPeach12925. Iād be interested in your answer to @TheSevenflyerās question as well.
One other option, start-up the TBM or Longitude and manually load the FP and see if this still happens. Would be an interesting data point to see it this may have to do with importing the .PLN via the World Map. Just a thoughtā¦
For problems like this, posting a video starting just before joining the transition is probably the best way to get some help.
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The most likely scenario here is that the last leg prior to the approach transition is a manual sequence leg (VECT on the CJ4 and MANSEQ on the Garmins). In this case it is expected that the pilot be flying the course to the next leg manually (or be receiving vectors from ATC). In FMS guidance the aircraft will proceed along itās previous course indefinitely.
You can activate the next leg or use a direct-to to proceed.
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Thanks for your reply.
The departure airport is KLUK with a direct departure to KLEx using a direct arrival to the RNAV 22.
The route is KLUK,CUCJU,ZIRKE,DARKS,GENUS,KLEX
I have flown this route easily over 40 times because it is a quick flight and I know the routes both to KLEX and back to KLUK
When I fly the TBM it will follow the GPS perfectly until I get to the transition(Genus)and then it will fly off into a different path until I manually hit the GPS on the Garmin Flight director.For each plane the magenta flight path will disappear once they hit the transition.
This same thing happens when I fly the CJ4.
Interestingly when I look at the FMS the flight plans are loaded correctly.
In fact in the CJ4 I have manually hit the flight plan and execute buttons and the flight plan is present.
I have not tried to manually load the FP in the planes.
Again until I did the manual update I would fly RNAV approaches at many airports here in the Midwest and in Fla without any issues flying the TBM,KingAir and CJ4
To be honest Ihave not tried any ILS approaches because I have been so consumed with trying to get my basic RNAV approaches corrected.
You should try one to see if it works OK, it will help narrow down the cause.
Excellent suggestion that I have considered but not yet tried.I will give it a try.Thanks
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Absolutely!Great suggestion and I will plane on doing it.Thanks
I have not tried an ILS approach but I will try one to see.Thanks
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Interesting.This makes perfect sense and Iwill certainly give this a try.
The only question I have is why has this changed in the three planes I fly routinely since the update?
I know there have been many upgrades to the CJ4 and probably this is one of them?
Again, before the updates I flew theses planes on many RNAV approaches in the Midwest and in Fla without much issues.
I appreciate your suggestions. thanks
The avionics of those three planes (CJ4, TBM, Longitude) were completely overhauled and significantly upgraded in AAU1 (including beyond the WT mods), the culmination of a year and a half of work on them. As such they now operate like their real life counterparts.
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I appreciate that information and I figured it was related to the updates.
Hi @NightPeach12925
Hopefully youāve worked things out by now, but if not, here are a few things to consider with this flight.
I set up the same basic flight, and made sure the RNAV 22 approach was selected. That should add the approach waypoints to your flight plan. The RNAV approach defaults to the IAP of VISCO. Once in the plane, you can chose another IAP by going into MFD/Procedures/click on the RNAV approach then click ātransitionā to pick another point if desired. The default one is fine for now.
There doesnāt appear to be a manual sequence after the last enroute waypoint and the IAF for this route, but make sure after you pass the last enroute waypoint you go into the MFD/Procedures and click āActivate approachā before you get to the IAF (VICGO) so that the FMS actually routes you through the approach. If you pass VICGO before you activate the approach, the FMS goes into āSUSPā mode, and wonāt provide accurate guidance since it thinks youāre at the end of your desired route (even though thereās no manseq in this plan).
Iāve got a bunch of other screen shots if you want to see what should happen after you activate the approach and start the arrival.
If you still have questions Iāll post some more of the screen shots and hopefully answer any concerns you have.
Regards
PS. Included one screen shot of the APPR button activated before the GP hits the middle point. It will then follow the GP down.
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Potentially this issue has arisen due to refinements of internal reference data used by the avionics.
I duplicated your route in the Flight Planner, chose a (C172) G1000 glass cockpit, and for me, the resulting flight worked perfectly, including a successful ILS descent and touchdown at KLEX.
.
I am in the habit of most always selecting my chosen āapproachā option and manually approving the respective āTransitionā choice, confirmed prior to departure.
.
In this instance, on the navigation G1000 (and using the mouse) the process followed was:-
- Press āProcā or Procedure Mode
- Scroll the focus to āSelect Approachā and press [enter]
- Scroll the focus to āRNAV22 LPVā option and press [enter]
- A dropdown appears in respect of the āTransitionā selection (presumably because an RNAV22 approach at KLEX can arrive from one of three outermost directions; each conveniently portrayed in the adjacent Map window to aid and improve user differentiation) :-
ā¦ (i) SIRBE
ā¦ (ii) UPRAW
ā¦(iii) VICGO I chose this option by scrolling the focus to and press [enter] - Scroll the focus to āLOADā button and press [enter] for a contiguous flight plan from KLUK to KLEX
.
My āworkā for the duration of this flight was then to timely engage (i.e. Grab) the glide slope, deploy the flaps and control the throttle through finally powering down the C172 at the destination parking spot.
.
Wow, I did not realize that area of the USA was as flat as a pancake for as far as the eye can seeā¦
For anyone who may be interested, below is a link to a short tutorial YouTube video (work of Huddison to which I have no association) demonstrating how to carry out an RNAV Approach for a G1000 AP (noting similar principles likely apply to other contemporary APās) :
Autopilot Landing (
) & RNAV Approach using the G1000 NXI Mod
Habu2u2- I did not want to respond back until I have had an opportunity to fly several approaches with your recommendations.
I flew the TBM from Kluk to Klex .I set up the flight through World Map however unlike I had done prior I choose an arrival procedure.When I turned on the FMS the flight plan was already entered.I flew the flight and it flew perfectly.Today I flew from KRSW to KPIE using the same procedure of crossing an arrival procedure and the plane flew perfectly.
I then flew the CJ4 from KRSW to KPIE again selecting an arrival procedure from the World Map.Once in the plane I selected the flt plan in the FMS and then hit the execute button.Again the jet flew without issues.
I have also viewed a few YouTube videos and Iām also using SimBrief which has been tremendously helpful.
I canāt thank you enough for reaching out and helping me.I very grateful!
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Dr.Zhivago5338-Welcome and thank you so much for sending me this information with the video.I have not yet had a chance to fully review the entire video however I will have some more time later this week to review it and get some flying time.
Thank you again and I look forward to seeing more of your very helpful informative materials.
Really glad itās working for you!! There are all sorts of approaches you can try now. If thereās an issue with another approach, let us know and weāll see if itās the sim or some issue. There are approaches that seem to have specific issues, especially if you donāt have a chart to reference.
Congrats and Regards