$WPNV - We provide cost-effective preventative maintenance, “in-air” services and inspections (maintenance and service to a wind turbine while it is mounted on top of the pylon – in service). Capabilities also include the maintenance of multi-stage oil-filtration for turbine gearboxes, as well as ground based turbine systems monitoring and oil-changing equipment.

http://wpienergy.com/products-services/mainte...nd-repair/