The PT-6 turbine engine used in the Basler is extremely reliable. Pratt recommend overhaul at 4,000 hours but many Australian operators were running them to 12,000 hours when on-condition overhauls were allowed.
The old radials sound better and I love them but average time between overhauls was typically only 1,200 hours and they are very maintenance intensive.
I would suspect pilot error in most cases.
You could do a search of the NTSB site using Basler as your search engine and it will show all the historic ones. New ones take a while to add depending on how open/shut the case is.