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What is the process for adding an ESN to the Engine Change Tool so I can install it?

I am trying to install an engine however the ESN is not available for me to select. What is the process for adding an ESN to the Engine Change Tool so I can install it?

If you acquired an engine and the ESN has not transferred ownership to your carrier, please follow the steps below to inform CFM to transfer ownership.

NOTE: Select ‘work stoppage’ priority if the ESN is installed on an aircraft

Click on ‘Ask CFM’:


Click on ‘Engine’:


Click on ‘Engine Change’:


Provide the following in the description field below:
• Date the engine was transferred into your fleet
• State whether the engine is a lease engine, or you purchased the engine
• Owner of the engine


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