Canonical: https://aegisonshore.com/services/major-component-exchange/ (image: Nacelle component lifted at night by an Aegis crew) - [Home](https://aegisonshore.com/) - [Services](https://aegisonshore.com/services/) - Major Component Exchange Wind · Heavy lift # Major Component Exchange Removal and replacement of gearboxes, generators, main shafts and blade bearings, executed with [engineered lift plans](https://aegisonshore.com/c/), precise rigging and minimal downtime. [Plan an exchange](https://aegisonshore.com/contact/?asset=wind&topic=mce#request)[Emergency swap](https://aegisonshore.com/contact/?asset=wind&need=emergency#request) Planned or emergency ## Protect asset life and production targets. Major Component Exchange is a critical service for maintaining the long-term performance and safety of [wind turbines](https://aegisonshore.com/services/wind-energy-services/). Using advanced rigging techniques, engineered lift plans, and crane coordination, we execute exchanges with precision and minimal downtime. Whether it’s a planned replacement or an emergency swap due to catastrophic failure, Aegis Onshore ensures each MCE is performed safely, efficiently, and in full compliance with OEM standards. - **Gearboxes & generators**, uptower or with crane support - **Main shafts & blade bearings** - **Engineered lift plans** with pre-lift inspections and NCCCO operators - **[OEM platforms](https://aegisonshore.com/our-story/renewable-experience/)** including GE, Siemens Gamesa and Nordex/Acciona (image: Major component exchange on a wind turbine) Crane & rigging ## Heavy lift, coordinated end to end. From nacelle swaps and blade replacements to structural lifts, we coordinate engineered lift plans, rigging, transport logistics and on-site operations, with crawler, all-terrain and hydraulic truck cranes. [Crane services →](https://aegisonshore.com/c/) (image: Crawler crane at a wind turbine during an exchange) Aegis field photo FAQ ## MCE questions ### Which components does an MCE cover? High-value turbine components such as gearboxes, generators, main shafts, and blade bearings. ### Can some exchanges be done without a crane? Yes. Many corrective repairs, especially for gearboxes, bearings, and generators, can be completed uptower without cranes, reducing cost and downtime. ### Do you handle the crane and lift planning? Yes. We coordinate engineered lift plans, rigging, crane transport, setup and permitting, with NCCCO-certified operators. ### Do you respond to emergency failures? Yes. Whether it’s a planned replacement or an emergency swap due to catastrophic failure, we mobilize crews and lift planning fast. Talk to Aegis ## Component down? Let's plan the swap. Planned maintenance, a failed component or storm damage: tell us the site and the problem and the right crew responds. [Request service](https://aegisonshore.com/contact/#request) [24/7 emergency](https://aegisonshore.com/contact/?need=emergency#request)