re. post 132
In the intervening 19 years we have all learnt from that accident, and had the extra maintenance surveillance to prevent a re-occurence. Those on other types with similar engine and prop combinations at the time, have paid particular attention to their equipment indications in case they could be developing problems, ever since.
Anything is possible as the cause of this departure from controlled flight.
With time and hard work a finding/ probable finding will be arrived at.