@Trackdiamond: Have you EVER worked with ANY aircraft avionics, especially a T7s? Well I have. I worked for many months on a Level D T7 flight sim, which happened to use the AIMS avionics boxes... and a complete bastard they were to integrate. I won't expand on this, except to say that even with access to the source code and all interface diagrams, etc, all that was possible was to stimulate the system. There was absolutely no way to back-door into the system to allow the injection of simulated malfunctions, and other simulator behaviors. So, I'm bloody sure some Johnny with an Android phone is out of luck.