Onshore wind blade detachment in Denmark, reported 25-metre fragment travelling over 100 metres
2024Published 1 May 2026Responsible editor: Chief Editor
- Where
- onshore wind turbine in Denmark
- What
- 25-metre blade fragment detached and landed over 100 metres from base near roadway
- Injuries
- None reported
- Cause
- Not reported
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What happened
In April 2024, a blade fragment reported as around 25 metres in length detached from an onshore wind turbine in Denmark and came to rest more than 100 metres from the turbine base, close to a roadway. No injuries were reported. The event was recorded in a third party compilation of wind turbine accidents for 2024 and was one of a number of blade detachment events tracked across several jurisdictions that year. The publicly available reporting does not identify the turbine model, its age or the operator, and does not describe the response, the subsequent inspection of the wider fleet or any regulatory follow up.
Contributing factors
No root cause was stated in the available public reporting, and the source consulted is a consolidated accident compilation rather than an investigation report. It is not known from the source whether the rotor was turning at the time of the failure, nor what the prevailing weather conditions were. Mechanisms commonly cited in the wider literature on blade structural failures, none of which is established for this event, include leading edge erosion, lightning damage to internal structural elements, blade root bolt fatigue, degradation of blade shell bond lines, icing induced load imbalance and wind loading beyond the design class. These should be read as general categories for operators to consider in their own risk assessments, not as findings about this incident.
Lessons learned
- Assess credible blade fragment throw distance for turbines near roads, paths or buildings.
- Reconcile setback distances after repowering or fitting longer blades.
- Report blade failures to industry collation schemes to inform fleet inspection planning.
More lessons on structural integrity and turbines, from every incident on the register.
Not yet known
- Turbine model and age
- Operator name
- Root cause of detachment
- Whether rotor was turning
This entry is updated when these are reported. Get an alert for the next one like it.
Source
Published 2026-05-01. Written from public reporting. Descriptive, not investigative. See the data accuracy disclaimer.
