Accident Description
A helicopter was engaged in lifting construction supplies to a power line tower in a mountainous area. During the accident flight segment, the helicopter had delivered a load of dry cement in a cargo net and was returning to the staging area with the empty paper bags still in the cargo net.
Sequence of Events
As the helicopter established a 20-foot hover at the staging area, the cargo net flew upward and struck the tail rotor. The impact caused the tail rotor assembly and gear box to separate from the tail boom. Subsequently, the helicopter began to spin.
Outcome
The pilot lowered the collective to initiate an autorotation, and the helicopter landed hard. No further details were provided in the source.