i have solution !!!!Enter "current Aircraft" , select pmdg 737 ngx aircraft... okand "save"...now... your default aircraft is pmdg 737 ngx... when start fsx... if you have quadrante .... when ending or loading game, the contol move to zero....(Example: flaps=retract , spoiler up throttle=0%...etc)if the control is active, pmdg crash.... enjoy....