For me there is an element of doubt about the whole thing. I know the 139 has AP issues and that is fair enough but when you look at the timings of the incident and then how long they spent on the ground it just doesn't sound like normal behaviour. By staying on the ground with the CVR on for 47 minutes it allows it to restart the 2 hour cycle and wipe all voice recordings of the incident.
Maybe something in it, maybe not, maybe just the musings of a Southern North Sea jockey.