I am trying to plan a flight from KJFK to KBOS 22L arrival runway using the ROBUC3 STAR (joining at MERIT). However, whatever I do it always routes through NUNZO and not through the eastern route which is what should happen for a 22L arrival AFAIK.
The navigraph app routes it correctly, but in the a320 FMC it doesn’t.
See attached for the route it makes and the route it should make I think.
The simple answer is, when the same STAR has a number of variations depending on the runway in use, MSFS automatically picks the first variation on the list. Usually the first runway, in this case 4L/R.
Until MSFS change this so that the approach selected also affects the STAR, there’s nothing you can do.
Thanks for the explanation @norman99. That’s pretty unfortunate, but good to know its not a navigraph issue 
