95% of my flights have one AP disconnect. I can find nothing common that is causing them but for no apparent reason my C-130 AP will shut off and I get the flashing warning light "AP OFF". The only thing that will allow me to turn it back on is "Shift+A" (avionics) but all my other avionic devices are still on. This only happens once per flight, and usually near the beginning. I have FSUIPC (registered) and use the unlimited battery fix.