The fatal accident to G-XCEL AS 355F (3 killed) might be of interest from a technical point of view, AAIB report available on line.
The cause was put down to a batch of free wheel rollers that had a manufacturing change applied.
Manufacturers are changing process all the time so what works today might not work tomorrow.
As has been pointed out the 225 has flown thousands of hours without incidents of this nature till recently so a change is a likely cause.
This failure doesnt affect the fundamental safety of the design but has to be addressed urgently..
Have a read at the report above it offers some insight in to this isssue.
Two engineers and the pilot were killed in the 355 on airtest. One of the engineers was a good friend the second the son of another well known engineer. Very sad indeed.