First, let me praise the folks at PMDG for a fine product. I have been flying the 737 NG for over a year now and I am still amazed. I am not one who likes to waste others time with questions that I can't go and search for the answer myself but I have run into a problem researching the answer to this problem. I have noticed some posts about this same issue but no great answers as to how to definetly fix the problem. The scenario is this. I was flying into Atlanta Hartsfield today and going to make an ILS approach for runway 10. When searching arrivals in the FMC, ILS runway 10 was an option. Approaching the airport, I had tuned the localizer (111.55) and was able to hear the ident. I had been in LNAV and was using the LVL change to step down to each fix instead of using VNAV. I had the VOR/LOC button active on the MCP, however I never captured the glideslope. "NAV INVALID" showed on the bottom of the FMC and I figured it was because the ILS frequency tuned must not be the ILS frequency either for the field or in my database for the FMC. I have the latest AIRAC cycle from Navigraph. It must be that I need to verify that what is in the software for MSFS matches up for what is downloaded into my FMC data. If so, where do I go to verify this and how would I change it if one does not match up and needs to be changed? I am using FS9.Thanks for any help that someone can give.James Williams

Unless you have added scenery, I don't think MSFS has the new runway 10/28 at KATL. You can check by opening the MSFS map at the airport and getting airport information by clicking it.

Unless you have added scenery, I don't think MSFS has the new runway 10/28 at KATL. You can check by opening the MSFS map at the airport and getting airport information by clicking it.

I do have the runway on the grid. 10/28 is visible from the air. I had added this a few months back, but this is actual first time attempting to use the runway itself.

I do have the runway on the grid. 10/28 is visible from the air. I had added this a few months back, but this is actual first time attempting to use the runway itself.

Bring up the FlightSim Map, drill down on the airport, and see if 10/28 has an ILS freq listed. This is the freq that is used... not the freq in the FMC.If it's not listed, or is listed with a wrong freq, you need updated scenery.

Bring up the FlightSim Map, drill down on the airport, and see if 10/28 has an ILS freq listed. This is the freq that is used... not the freq in the FMC.If it's not listed, or is listed with a wrong freq, you need updated scenery.

To ask a silly question...where do I get to the fligtsim map. Is this listed in the game's directory and an actual map that can be pulled up?

A few months back I did update FS9 with a file that did add runway 10/28 to the game. When I am flying in the game, I see this runway present whereas before adding it, it was not there. I checked the file "wpNavAPT" and the correct frequency for ILS 10 is in there. It was also the correct frequency listed in Approach INIT and what I was dialed to. Is there another angle to this that needs to also be in sync with what I have mentioned?

James, it might pay to load katl with the default cessna then click on the map icon and click the airport to see if the ils is actually displayed - should be 111.5/092 I think for that R10.It wont be there in the default scenery but will be if you've added a descent addon for katl.Also if the addon was done well it will show in the gps as well.I have the FRF-KATL v2 (freeware) and that works fine.John Ellison

James, it might pay to load katl with the default cessna then click on the map icon and click the airport to see if the ils is actually displayed - should be 111.5/092 I think for that R10.It wont be there in the default scenery but will be if you've added a descent addon for katl.Also if the addon was done well it will show in the gps as well.I have the FRF-KATL v2 (freeware) and that works fine.John Ellison

Interesting. I did just that, but when I looked at the ILS Freq for runway 10 it had 108.1 listed. Just curious, since this does not match up with what is published, how can I change that?I need to clarify that this is the frequency listed in MSFS for that runway. So apparently my scenery update for KATL is working and showing that there is a runway 10/28 but that the listed ils frequency for that runway (10) is wrong. Obviously I would want it to match what is published in the AIRAC cycles and on Terry Yingling's updates so my question is how to change this 108.1 in MSFS to the 111. 55 that it should be?

Thanks for everyone who has attempted to give me ideas on how to correct this problem. After checking the ILS frequency for the field on MSFS that was suggested, I noticed this was not the correct published frequency for runway 10. It was 108.1. I did a test run and sure enough, 108.1 captured the glideslope and brought me down pretty as a picture. I bought the scenery upgrade for Atlanta about one year ago from MegaScenery. The way I figure it, it was through this add on that I am even able to see runways 10/28. So when I pulled this up on the map in MSFS, the listed frequency for this runway must have been programmed by MegaScenery in order for anything to show up at all for Runways 10/28. I have a question in now for the folks at Megascenery as to how to get behind the scenes of their software and hopefully correct this. If it goes unanswered however, I would appreciate any direction for additional software that others recommend that will allow for me to upgrade Atlanta-Hartsfield with runway 10/28 that uses the correct ILS frequency. Boy what a day..James Williams

You can modify an ILS freq in MSFS by editing the AFCAD file with a free AFCAD editor... too bad AVSIM library is out but I expect you could find one in one of the other libraries such as flightsim.com. You can also modify the freq provided to the aircraft by navdata, which is probably the easier method, on the CDU NAV RAD page.

You can modify an ILS freq in MSFS by editing the AFCAD file with a free AFCAD editor... too bad AVSIM library is out but I expect you could find one in one of the other libraries such as flightsim.com. You can also modify the freq provided to the aircraft by navdata, which is probably the easier method, on the CDU NAV RAD page.

I'm learning more about programming than I ever thought but I see your point about the easier of the two would be to edit the navdata. I know how to easily get to that, but wouldn't that be scrapped at the next update of my navdata from navigraph? I'm going to try my hand at editing the AFCAD like suggested. I have a question in though to project AI b/c I realized last night after my last post, that I had downloaded a patch from AVSIM library written by Jim Vile to upgrade KATL with new jetways, gates and the runway 10/28 itself. It must have been in that patch where the MSFS map was altered as well as the ILS frequencies that it is giving when I double click on the map itself. I noticed this morning that not only the ILS for runway 10 is wrong but also for 28. They both should be 111.55 and 11.75 respectively. Instead they are labeled 108.1 and 108.3. Hopefully one of the programmers there will have a suggestion.

I didn't suggest editing navdata, I suggesting changing the automatically selected ILS frequency manually to the one in use by your scenery. There are lots of places in the world where this has to be done due to the obsolete data in MSFS.

I understand. I downloaded an AFCAD editor that allowed me to change the ILS frequency that is displayed on map view within MSFS. I'm not sure if this is going to actually make a difference when flown though. I plan to check it out today sometime.