I suspect this will transpire to be an issue with how the sim handles ILS DME stations but I’ve noticed that for ILS without a back-course the associated DME stops working once you’ve crossed the runway threshold (ie. it only works in the front-course 180 degree arc).
This is an issue in the UK at least because we have some airports that have an ILS only to one runway end but use the associated DME in an NDB/DME approach to the other end. Examples would include Southampton (EGHI) and Humberside (EGNJ).
Humberside even includes a DME arc based off an ILS DME which is impossible to fly in the sim:
I’ve not tested without Navigraph data installed because I gather the default sim includes a back-course for every ILS which I suspect would allow the DME to work.
Is there anything that can be down within the Navigraph data to enable the DME through the whole 360 degrees or do I need to go an petition Asobo to fix this?
Edit: It also means you cannot fly the missed approach which relies on the DME.