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I noticed that an incorrect ESN is installed on an aircraft, how do I get the correct ESN installed?

Please follow the steps below to submit an inquiry so CFM can update the portal’s database.

Click on ‘Ask CFM’:


Click on ‘Engine’:


Click on ‘Engine Change’:


In the description below include the following:
• Aircraft tail number
• Incorrect ESN that is currently installed
• Correct ESN that should be installed
• An installation date of the correct ESN

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