The owner must be fully aware of what has happened and is happening on his wind farm, during and after the DNP. The information generated in the turbines and recorded in the SCADA, together with the CMS and the information provided by the OEM about its maintenance interventions, design changes and RCAs performed during that period do not allow to fully evaluate the performance of the assets.

The main components, and others essential to achieve an adequate performance of the assets, may be showing symptoms of premature wear and tear and may not be detected
by any of the control tools mentioned in the previous paragraph.

End-of-warranty (EoW) inspections, conveniently introduced into contract scopes, are a tool that greatly assists in determining that assets are not suffering from problems that will prematurely prevent components from reaching useful life.

The right time to perform them, due to the time needed to prepare the physical inspections themselves and the preparation of the reports, complying with the contractual deadlines for eventual claims to the manufacturer, is 6 months before the end of the DNP. This should be reflected in the supply contract, as well as the requirement of the OEM’s collaboration in facilitating third party inspections.

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