I had previously checked the aircraft.cfg files but the information there is correct.Also in the program (and in AircraftTypes.dat, as far as I can interpret the data) it appears to be correct.Strangely enough, I just ran the Generate Flightplan from scratch (Start program, Generate Flightplan) and everything came out alright. :-yellow1Previously, I had started the program, made all the changes I wanted (including Make AI) and right after that, the Generate Flightplan without restarting the program. It could have been a memory leak in my computer that caused this problem. :-hmmm :-hmmm :-hmmmMarco