TODO:
* Cockpit switches/knobs: lights, de-icing etc.
* Radio
* Adjust autopilot for better responce and stability
* Brake parachute
* Radar functions: manual mode
* Lights
* Hysteresis in buffeting
* Submodel droptanks
* Effects when flying
* Battery sim in electric system.
* Start fuel limit
* Hydraulics - gears and brakes
* Engine air restart and emergency generator
* Faults
* Rembrandt
* Transponder http://www.flightgear.org/forums/viewtopic.php?f=75&t=19826&p=182279#p182279

And much more...
