NH Industries statement related to ADF grounding and withdrawal of MRH-90 available at:
http://www.nhindustries.com/website/...ogram_180.html
This release indicates they have "not identified any information from the initial flight data that relates to a failure, malfunction or defect linked to aircraft design".
That isn't to say this might not still be the case, just that it is in contrast to the "dangerous" tag the type has attracted in our local media and by some politicians.
Given NHI also list worldwide operating hours at 380,000+ in this statement, accident rate can be calculated: Searching Aviation Safety Network database for "NHIndustries" reveals 11 incidents for type (all variants) worldwide of which 2 were minor damage, but 4 fatal with 8 deaths in total. So a mishap rate of about 2.9 in 100,000 hours or fatal accident rate of about 1in 100,000 hours. Of the earlier 3 fatal accidents, unclear from the ASN descriptions whether any were due to any design or production flaws of this helicopter type.