I activate the Jetway by pressing Ctrl+J. Jetway move towarts the A/C.....but the Jetway sinks into the underground!!!
This is to be expected: Zurich uses the default jetway animation system (we only model the jetway, but it's FSX which animates them), which is well known to have bugs, so there's simply nothing you or we can do to fix it.
That's one of the reason SODE has been developed recently, as an alternative to the very bugged default jetway animation system, but the scenery must be programmed for that.
Our two most recent sceneries, KIAH and KMEM, has been updated to use SODE jetways, and we plan to update all our existing sceneries to support it, but this will take some time.
The real height of the tarmac at LSZH is 1'416.1 feet. How and where can I adjust this value?
That's not the problem, the airport height it's obviously correct in the scenery and there's nothing to change, the issue is only the default FSX jetway animation system is bugged, and there's nothing we can do about it, other than switching to SODE, but this will take some time.