Tourist:
If you are the pilot, and you crash a servicable aircraft, then it is almost always your fault, end of.
Well possibly, but that's not what we're discussing now is it?
If, for the sake of argument, the Mull Chinook had indeed had an airworthiness event; a FADEC power up/down, Uncommanded Flight Control Movement, jamming of Flight Controls in 1,2 or all 3 axis, take your pick as they were all known airworthiness problems at the time, but control was regained and the aircraft safely force-landed, the odds are that it could then have been "Ground Tested and Found Serviceable". So would the pilots, who failed to complete the task but saved the aircraft, end up with a black eye or a feather in their caps, or both?
As to your comment re the MAA, I can only wish them luck as it looks like they'll need it!