Articles filed under Structural Failure

'Forgotten washer' heard in hub before wind turbine collapsed in Cape Breton

Enercon's email did not elaborate on the hub's damage. However, documents from the Labour Department regarding a subsequent stop-work order said a hub assembly was damaged in a "bearing failure" in March 2016. On Aug. 17, workers tested the turbine's lightning-protection system, which required positioning the blades so they pitched into the wind.
15 May 2017

Hundreds of Tuscola County wind turbine motors being replaced, design flaw blamed

Gauger said it’s been determined that the “old style” keyway pitch motor is “defective” and not able to handle the load that is being placed on them by longer blades. He said the motor is essentially trying to adjust itself so that there is less drag. “What happens is on the upswing or the downswing, it’s actually got some slack in there and that’s that clunking noise that people are hearing,” Gauger said.
14 Jan 2017

http://www.windaction.org/posts?topic=Structural+Failure&type=Article
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