Hi, I have a big issue with the a330 aircraft. Whenever I am doing a flight at some point (seemingly random) the autopilot disconnects, so does the autothrottle and sometimes it banks hard left. Toga LK is then shown on the pfd. Once i have the aircraft back under control I have to set the flight directors and put back on the managed speed heading and altitude. On a long haul flight this happens about 5 times. I have all assists off ans the turbulence on the low setting. The flight model is on modern. Any help would be appreciated.
Thanks,
Jack