When A/P is selected with or without LNAV, autopilot simply disengages. I recall this problem some time ago but not recently. Any solution is appreciated.Note - Message posted here since PSS will probably not post or wait 10 days or more.

Is your battery dead?FSUIPC extend battery unlimited, go back to the default Cessna and make sure all the switches are on including magnetos, or use (been a while, ctrl-e?) autostart to start the engines and they'll be engaged.Good luck!P

Just had this problem again the other night and like you, I had to go find the answer again. It's your avionics power which is set to off from the last aircraft you were flying. Usually shift-a during preflight will do the trick (may have to assign key in FS options).AL