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New to MS 2020 and having ILS problem

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I'm flying the PMDG 737 and the aircraft wants to land short on ILS approaches. I haven't tried the other aircraft, and I don't think it's a PMDG problem, I'm just wondering if anyone else has experienced this before I try to troubleshoot it. I flew the PMDG a lot in previous FS versions but it's been a while and maybe I have the procedure wrong but it doesn't look that way. 

What airport?  Some addon airports have issues with the approaches.

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I'll try one of the other aircraft. I have to be something wrong...

5 hours ago, Fatback said:

I'm flying the PMDG 737 and the aircraft wants to land short on ILS approaches.

The PMDG accurately simulates an approach mode called IAN.  After you arm Approach, verify it captures VOR/LOC and G/S modes, and not G/P.  A G/P mode would indicate you're in IAN mode and the aircraft is flying an FMC computed glidepath instead of the ILS glideslope; if this is the case, an altimetry error could bring you up short of the runway.

I mention this because it's easy to do by accident in MSFS because of the short range of navaids in general.  It's entirely possible to be at a point where you'd arm Approach in reality, but in the sim you'll get VOR/LOC and G/P because the sim thinks you're receiving the localizer but not the glideslope.  If you see G/P in white on your flight mode annunciator, select Approach again to disarm it, and wait till you're closer and try again.  It's an MSFS-ism.

Andrew Crowley

7 hours ago, Fatback said:

I'm flying the PMDG 737 and the aircraft wants to land short on ILS approaches. I haven't tried the other aircraft, and I don't think it's a PMDG problem, I'm just wondering if anyone else has experienced this before I try to troubleshoot it. I flew the PMDG a lot in previous FS versions but it's been a while and maybe I have the procedure wrong but it doesn't look that way. 

Have you updated the MAGDEC? If you are using Navigraph AIRAC update and Charts updating the magdec.bgl is essential for accuracy. Go here:- https://www.aero.sors.fr/navaids.html   to read and understand how it affects your sim, you can also download the updated magdec.

 

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