I'm accustomed to more astute observations from the usual posters. First the fuel cel red herring, lots of other helicopters didn't have them and they'd burn when crashed as did some that did, at any rate it didn't burn so nothing interesting there. Then the mast bumping based on what, wind? If there is some evidence the mast sheared I've been unable to find it. I'm more interested in weather and daylight and pilot. They departed at 16:00, sunset was at what, 17:20? Maybe dark sooner depending on cloud cover? 3000m is pretty high for an R44, but they weren't landing or taking off, and they were light. Just 'cause it was a Robbie isn't a reason to crash in itself. They are favoured by private owner/operators for cost though, similar to the Norway R44. Do we know any more about the pilot or the weather?