You can follow the steps below to add your pre-check number:
1) First of all, go to the American Airlines Website and log in.
2) Click on "My Profile" and choose " My Pre-check Number ".
3) Click on "Manage" under the Group of your progress.
4) The advancement bar will show you the progress of your
Global Entry Login. Click on "Apply" for Global Entry.
5) Provide the necessary details. Click on "Manage" to add your Pre-check number.
