Jump to content

Sign in to follow this  
jimmy64

Flight1 GTN 750 in A2A 182

Recommended Posts

I'm having trouble getting LPV verticle guidance. Verticle guides never show up on the HSI. Using GPS mode and an active LPV approach. The aircraft follows lateral guidance under autopilot but just flies right over the airport. Tried NAV and APR mode both with the same result. I must be doing something fundamentally wrong or LPV doesn't work in 3.2. Hopefully someone who successfully has flown an LPV can give me a scenario and a couple pointers so I see how the GTN works with the A2A autopilot.


James McLees

Share this post


Link to post

I cannot believe P3D releases matter in this..   :wink:

 

When you first power on the GTN 750, and stop on the test page, does the HSI show the glideslope indicators "half up"?

 

If not, there is a problem..

 

If yes, try flying the KTPA, R01L LPV approach via PIE.

 

Fly at 2600 ft AGL on the autopilot in NAV mode until the glideslope indicators

become active when passing FITPA.  Then hit APR on the autopilot.


Bert

Share this post


Link to post

Thanks for responding Bert. The HSI does show the glideslope indicators on the test page. Still no indicators during the approach. Loaded and activated the 01L LPV approach via PIE with NAV engaged at 2600. Lateral guidance is perfect, aircraft does the procedure turn at FITPA, turns and lines up to cross FITPA for the approach. LPV is indicated in green, CDI on GPS, NAV in the autopilot. Once again the glideslope indicators fail to appear and the plane follows lateral guidance only. Since they appear on the test page, my guess is there is a problem with data. When loading an approach, the LPV is present along with all the others, but, when looking for it under CHARTS, it is not there.


James McLees

Share this post


Link to post

Hi James,

 

While I use the 650 - I can confirm that LPV does work with the182...

 

Did you run the "A2A Updater" to make sure you have the latest release/fixes for the 182 ? I know that's always the first thing the A2A guys mention when troubleshooting...

 

The last LPV I've flown in the 182 was into KMSV RNAV RWY15 via WECOL - and it worked like a champ...

 

Regards,

Scott


imageproxy.png.c7210bb70e999d98cfd3e77d7

Share this post


Link to post

Do you have the GTN installed in any other airplane for a test?

 

If you run the Garmin GTN trainer by itself, can you find the chart?

 

The approach does have a chart in my GTN navdata..


Bert

Share this post


Link to post

Same results in the Turbine Duke, test is okay, no vertical guidance on approach. The trainer has the exact same data as the unit in the planes. When selecting an approach to fly, I see for example, RNAV 01L LPV, however, under CHARTS, it's RNAV 01L. LPV is not added to the chart. I don't know if it makes a difference because when looking at the Skyvector charts for KTPA, LPV is not on the chart there either. I now think that it's an error with the unit after update after update without a full reinstall.


 

 


While I use the 650 - I can confirm that LPV does work with the182...
Thanks Scott, I'm sure that I'll get to the bottom of it. Good to know that LPV does work in the 182 for someone.

James McLees

Share this post


Link to post

James I flew the approach in P3D v3.2 / Skylane / GTN 750 - and the the LPV glide path balls appeared, and the APR mode flew the skylane down vertically.  I have Flytampa scenery and I flew the approach from PIE as well.

 

About a mile from FITPA, the glide path balls started to come down and at that point I pressed APR and the autopilot flew it down.

 

Confirm your GTN says TERM, then goes to LPV in green in the bottom?

 

What navdata are you using?

 

lpv01ltpa.jpg


|Ryan Butterworth|

| i7 4790K@4.4GHz | 32GB RAM | EVGA GTX 1080Ti | ASUS Z97-Pro | 1TB 860 Evo | 500GB 840 Evo Win10 Pro | 1TB Samsung 7200rpm | Seasonic X750W |

 

 

Share this post


Link to post

Make sure GTN is not suspended. Can you show a picture of the GTN on the approach?

 

Steve Aull


Steve Aull

Share this post


Link to post

 

 


Confirm your GTN says TERM, then goes to LPV in green in the bottom?



What navdata are you using?

TERM then LPV affirmative

1405 (latest for the GTN Trainer afaik)


 

 


Make sure GTN is not suspended. Can you show a picture of the GTN on the approach?

The OBS changes to SUSP during the procedure turn (FITPA to FITPA), then back to OBS once crossing FITPA the second time.


James McLees

Share this post


Link to post

I have an idea - PM me with your email address


|Ryan Butterworth|

| i7 4790K@4.4GHz | 32GB RAM | EVGA GTX 1080Ti | ASUS Z97-Pro | 1TB 860 Evo | 500GB 840 Evo Win10 Pro | 1TB Samsung 7200rpm | Seasonic X750W |

 

 

Share this post


Link to post

Okay I didn't have the latest installed. Had it, but installed the older one when I moved to 3.1. Hopefully that'll do it. Will try after work. Thanks Ryan, I will if it doesn't work.


James McLees

Share this post


Link to post

Thanks everyone, it's working perfectly with the 1504 navdata.


James McLees

Share this post


Link to post

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  
  • Tom Allensworth,
    Founder of AVSIM Online


  • Flight Simulation's Premier Resource!

    AVSIM is a free service to the flight simulation community. AVSIM is staffed completely by volunteers and all funds donated to AVSIM go directly back to supporting the community. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. Thank you for your support!

    Click here for more information and to see all donations year to date.
  • Donation Goals

    AVSIM's 2020 Fundraising Goal

    Donate to our annual general fundraising goal. This donation keeps our doors open and providing you service 24 x 7 x 365. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. We reset this goal every new year for the following year's goal.


    34%
    $8,560.00 of $25,000.00 Donate Now
×
×
  • Create New...