I disagree. Mainly because I'm a rotorhead, not a tacair guy. Those altitudes are not unusual for RW, and the 3710.7U says "shall" fly at 3000 ft, conditions permitting. But it also says "wildfowl". I may be sea lawyering here, but try flying on the east coast and avoid the Wildlife Refuges (or fly at 3000 ft)... It can be hard, especially considering some of our ranges are knee-deep in a wildlife refuge. There are no "Wildfowl" refuges on the chart.
What if they were doing a rescue? Are we to believe that they need to maintain a 3000 ft hover? Shit, the instruction doesn't say crap about that.
I really think this is a dick measuring contest more than anything else.
Not having all the facts makes this a difficult proposition (and I'm making some assumptions to make my point), but as a lawyer, I could make a convincing argument that hitting a powerline that is clearly marked on the sectional/TPC (I'm looking at it as I type) would fall under the negligent clause of the article. That, I could definitely sell to a jury - especially a Grand Jury where the rules of evidence are different than at a trial or CM. I acknowledge that it's a much harder sell to people like you and I who deal with this stuff every day, but the jury will be lay.
Again, this is not what I think or believe about the mishap - just endulging in a hypothetical.
Brett