Vestas has confirmed a turbine which collapsed in Germany earlier this month is one of its V39-500kW machines.
The Danish company said the hardware has not been under its service since 2003.
"We do not expect to be involved in the root cause analysis," the company said.
The turbine collapsed on 3 January during a storm in Volksdorf municipality in Schaumburg county, some 40km west of Hannover.
Nienburg police said that during the storm a blade from the 70-metre tall structure broke, followed by the collapse of the tower at about 1.30pm local time.
“We suspect the blade pitch control did not respond to the wind speeds,” the police said.
No one was hurt during the incident.
Image: Polizei Nienburg