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Blade Maintenance,
Inspection, and Repair From performance improvement to lightning protection measures

From performance improvement to lightning protection measures

We have under our umbrella Blade Partners, a 50-50 Japan-Europe joint venture run by us and SJTC (a Danish blade service company). In addition, we have established Japanese and European subsidiaries. SJTC has signed agreements on the disclosure of technical documentation with LM and several other companies, and Blade Partners has inherited these agreements, enabling it to assess defects and plan and carry out repairs even for blades manufactured by other companies.
Also, our group has many members with certification from the international rope access certification body IRATA, so we can carry out the work safely and with a high level of technical expertise.

Blade Maintenance and Inspections

We conduct close-up inspections using ropes and inspections using telescopic cameras.
We also make use of drones: by leveraging aerial imaging and AI-based screening, we can assess the level of damage and develop efficient repair plans.

As well as close-up inspections, continuity inspections, and drainage hole cleaning using rope access, we also conduct inspections using drones and telescopic cameras.
In addition to damage assessment by AI, the final damage assessment is made by an engineer with over 20 years of experience. Continuity testing of lightning protection systems is carried out using a highly reliable blade-specific, four-wire low-resistance measurement method.

Repairs

We can handle everything ranging from serious damage other companies would recommend replacement for, to simple repairs.

In addition to repairs performed using rope access by IRATA-licensed technicians, we also own gondolas that can be used for 4-MW-class wind turbines. This means we can propose repair methods tailored to the customer's budget, the extent of the damage, and the conditions at the wind turbine site.
We also have extensive experience in lowering severely damaged components to the ground for repairs.

Life Extension and Lightning Protection Upgrades

We conduct inspections, diagnostics, and repairs that are based on the latest manuals and carried out by engineers with certifications from European manufacturers and engineers with repair expertise acquired from Japanese manufacturers. We also provide performance-enhancing tools by introducing the latest European technologies.

<Specific examples>

  • Increasing power generation using vortex generators
  • Improving lightning resistance (modifying, changing, and improving lightning protection systems)
  • Proposing protection/life-extension measures (Implementation by each manufacturer is possible)

Note: LM-ProBlade Ultra / MANKIEWICZ LEP10 / Polytech ELLE / 3M / Fujikura Composites / Other manufacturers

Left: This photo shows modifications made to a lightning receptor system to improve the lightning resistance. After the modifications, we achieved a reduction in both repair frequency and the severity of damage even in one of Japan's most lightning-prone regions.

Right: Working on a MANKIEWICZ LEP10. When erosion occurs, the flow around the wind turbine's blades becomes turbulent, reducing its power generation efficiency. Unless proper maintenance is performed, there is also a risk that the blades themselves will get damaged.

"Blade Training Center (BTC)," Suzu City, Ishikawa Prefecture

Driving the next growth of the renewable energy business through technological capabilities and human resource development

Eos Engineering & Service (EES) is currently building the "Blade Training Center (BTC)" in Suzu City, Ishikawa Prefecture. The center will be Japan's first-ever base for training wind turbine blade repair technicians.
The construction work is progressing with the cooperation of Suzu City, local contractors, and other parties, and is due to be completed in 2026.
With wind power generation facilities becoming larger and offshore wind power expanding in recent years, demand for blade repair is expected to increase further in the future. To meet these needs, EES will promote the development of human resources with advanced blade repair skills through the BTC, and aim to be a leader in the field of blade repair in Japan.
At the BTC, as well as training technicians who can perform simple inspections and repairs, we will also train specialists who can handle more advanced repairs. We are also planning to launch Japan's first-ever GWO Blade Repair training course in FY 2026.
In addition, our subsidiary "Blade Partners" is a company that specializes in blade repair, and we will work with it to establish a comprehensive human resources development system specifically tailored to the field. In the future, we are also planning to provide training for external participants, and conduct research and development on blades.
At EES, we are hoping for a swift recovery for Suzu City, and as part of that, all our employees will work as one to get the BTC fully operational as a new industrial base that will coexist with the local community.

▲Conceptual illustration of the completed BTC
For more details, visit Blade Partners

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