Dave, some info for you to ponder:
Fact no 1: The Digital Engine Control Units (DECUs) had (and still do have) a history of malfunctioning to the extent that they have either shut the engines down (undemanded), or refuse to allow a demanded shutdown - as I have personally experienced on the HC2.
Fact no 2: The MoD was in the process of taking legal action against Boeing Helicopters at the time of the Mull crash.
Fact no 3: One of the Reviewing Officers, ACM Sir John Day was promoted to CinC Strike Command, awarded me my wings and recently retired from the RAF to join the board of British Aerospace.
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The first 2 paragraphs make me suspect something was and still is, definitely wrong with the HC2.
The 3rd para? Well I think it just goes to show that as long as you pin it all on the aircrew and absolve the equipment of any fault - it's better for your career prospects in corporate life after the RAF!