Hi,
I have now cross-checked all - the position was changed in the current AIP:
Here the antenna coordinates from the ILS05 (IAA) from the current AIP:
Here, what Jeppesen offers:
S37002154 / E174482932
So, you see Jeppesen (our source) uses exactly the same coordinates as the AIP offers. Also these coordinates are correct now and center lined. So, that´s the initial position. The Jeppesen data are correct so far now.
I have also compared now the data from MSFS and here we have a offset now and the reason are the runway thresholds in the MSFS scenery. With the workaround, I aligned the ILS antenna position with the center line. That works because I have used the runway-coordinates from the MSFS which are not always 100% aligned with the real-world data. Due this delta now, you see an offset.
Solution for the future:
I will remove the workaround with AIRAC 2408 to avoid such deltas. In this case (NZAA) the ILS should be center lined again (also with the PMDG). With 2408 I will only use the real-world data and will not aligned it again with the center lines from the MSFS runways.
Cheers,
Richard