just for those who are undoubtedly going to run a million miles in the wrong direction with the acars information.
Autopilot disconnect will show on the data regardless of how it was disconnected. So although we know it disconnected we still don't know if the disconnect was manual or automatic.
However considering the multiple ADIRU fault messages less than a minute later one could be forgiven for assuming it disconnected automatically due to the increasing amount of failures for whatever reason.
But this then leads to another issue. Multiple ADIRU faults are unheard of. It doesn't happen unless the aircraft has suffered some extroardinary event.
Make what you will of this FACTUAL information.