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...Wind o m topical outline utility scale mw r d cost trends distributed kw type of costs annual fixed scheduled maintenance oil lubricants sensor evaluation condition monitoring leasing taxes insurance variable unscheduled worn out parts catastrophic failures generally the increase over life turbine especially in later years year useful there are industry recommended practices for all aspects towers rotors blades hubs gearboxes generators balance plant data collection reporting end warranty expressed as yr capacity based mwh or kwh energy simple major components at risk equipment breaks usually after expires structural gearbox rebuild blade replacement t s y c n a i p e w yaw drive pitch generator bearings motors and switchgear control sensors reference chris walford gec now dnv gl nrel research development source report on subsystem reliability survey various databases sheng publication database pr...