Hi Umberto,
I know this has been covered before but it seems it is becoming more relevant now as many airports around the globe are becoming more stringent on the use of APU's in aircraft parked on the ground at Gates, Ramps, Aprons, etc.
Ground Power Units/Air Start Carts are now becoming the norm in terms of operational use.
Can you modify GSX to allow pushback without the need for APU? GPU starts and crossbleeds are becoming far more common nowadays (APU fuel costs, environmental issues, etc)
Much appreciated.
Rgds,
Steve
