I have a small well minor issue with my 727-200F when using airhauler, The problem is i cant keep the avionics running for more than ten minutes which is making it impossible to use the auto pilot and radios.

When starting a flight through airhauler it just cuts the fuel and switches the battery off and all other switches remain in the default state, Now when i fly a normal cold and dark flight i can start the aircraft with no issues and i never lose the avionics which makes me think im missing something when im restarting the 727 as im following the normal cold and dark start up i think.

Does anyone have any idea what im doing wrong or is there a way to change the default state to cold and dark for any flight instead of engines running ??