Inspections & Root Cause Analysis

Inspections & Root Cause Analysis

Ensuring safe and efficient operations, UL offers independent technical inspections on wind turbines and components during the whole project life cycle. We provide services that allow project developers, wind project owners or investors to combine technical safety with a reliable and profitable management plan for the long-term operation of the wind farm.

Wind Turbine Inspections

Wind turbine inspections are important, and often required, at various stages of the wind project lifecyle to ensure reliability, safety, and performance. We offer inspection services for onshore and offshore wind turbines and their components and provide completely independent and objective information to accurately characterize their current condition, identify technical issues, and document all findings and recommendations in an accredited report.

Combining more than 27 years of experience in wind turbine technology and a very well-documented, accredited process, we are the best partner to ensure your inspections comply with the highest standards and are accepted by all parties.

Inspections can be performed at the following locations:
• Factories, including the manufacturing quality control process
• Origin and destination ports and hubs
• Transportation means for main components
• Onsite during the project construction and operation

Inspections can be performed at different stages of a project’s lifecycle, including:
• At any point in the supply chain to verify the quality of components
• After COD to establish a punch list before signing an approval certificate
• Before the end-of-warranty to ensure that warranty claims and contractual
obligations of the manufacturer are fulfilled before the deadlines
• During the life of the wind project, recommended every 2 to 4 years
• At the end of a wind project’s design life to determine remaining useful life

Wind turbine inspections include inspection of their main components including:
• Endoscopic inspection on gearboxes, bearings, main shafts, pitch systems
• Vibration measurement and diagnosis for the drive train, shaft alignment
• Inspection of blade and/or blade lightning protection system from the ground, uptower, or with drones
• Insulation test on generator
• Additional reviews including oil and grease analysis, ultrasounds, penetrating
liquids, and more

Root Cause Analysis (RCA) and Damage Assessment

When turbines are damaged, our qualified inspectors, and structural and mechanical experts conduct a root cause analysis (RCA) to determine the reasons. It is of critical importance to evaluate the pervasiveness of the causes across the complete wind project, and clearly define measures to mitigate the consequences. Our RCA processes are based upon proven methodologies (including IEC 62740), which start from a gathering of all facts surrounding the incident and methodically reaching a conclusion.