Hi Dozer, all great ideas and we have discussed that already quite a bit. For our V1.0 this will not be included, we simply want to get this done with the basic (normal) functions as fast as possible. But functionality like that should be easy to add later, as a matter of fact Tom has already done a script that can deliberately "fail" any bus, so we can check the respective equipment going dead as it should. I know that the hydraulics is also coded in a way to handle "leaks", for example. Some default XP failures work as well (i.e. engine failures), and of course there are all the failures that can be emulated by simply switching "off" the system in question. Actual "degradation" of systems is not really something that is a big issue in passenger jets, except for the tires, maybe. Most systems either work flawlessly or they are replaced. If a system gives us advance warning by performing less than nominal we consider us lucky. Usually stuff simply fails. Jan