Police says the found fragments of the rope still attached to the helicopter.
They claim the rope was up to the taks (not old/brittle), the hook system is claimed to function properly,
current suggestion is towards "weather" and challenging environment of narrow gorge:
local downdraft induced descent + rupture after contract with mountain.
Absturz bei Seilbergung: Seil dürfte gerissen sein - steiermark.ORF.at