My mistake then
That means I misunderstood my Kmax mechanic friend. I know him and I know the company that owns the helicopter, but I don't know who the pilot was. And you may be right that the company/owner leased the kmax out to a third party that actually had the contract to down the chimney.
But still, the Kmax was in no danger of damage on this job as long as the helicopoter is handled properly and the process of knocking down the chimney was done correctly.