This reminds me of an accident that happened in the early 80's in BC. At the companies main base the ramp space was limited and spots to land to be able to reach the fuel hose were also limited. A 206 was wheeled out of the hangar after maintenance and left there unattended with the blades fore and aft but not tied down. A company pilot came in and landed beside the parked 206 and was doing his cool down at ground idle when a newly hired apprentice seen that the parked 206's blades were not tied down. Having been told that it is not good to ever leave a 206 outside without the blades tied down......you can see where this is going.
Yes, he went and retrieved the tie down from the a/c, hooked the forward blade and proceeded, to the dismay of the pilot in the still at ground idle 206, to walk the blade around to tie it down. Luckily no one was injured in the ensuing catastrophe.
So, what was the root cause here? There were many factors that lead to this accident and breaking any one link in the chain could have prevented it, but IMHO the ROOT cause was either the small available ramp space or the limited length of the fuel hose.