Sweden’s Accident Investigation Authority (SHK) has blamed fatigue in bolts on the tower of a Vestas V112-3.0MW turbine that collapsed in late 2015, highlighting inadequate assembly.
The turbine collapse at the 98MW Lemnhult wind farm south of the town of Vetlanda in Jönköpig county on Christmas Eve 2015 was the first such incident involving one of Vestas’ MW-class machines.
The SHK in a summary of its investigation said bolts that had held together the flange between the first and second of six sections in the tower structure failed, and the upper part of the tower fell.
“The
