Object won't follow the axis

I’m new to this and am currently stuck in a serious situation. I’m making an animation of an aircraft. In my animation, the axis is following the path defined but the object (aircraft) is not going along with the axis. It stays on the ground and does not follow the path as the axis does. What should I do?

Sounds like the pivot point of the plans isn’t correct but more information is needed.
Are you using some king of path follow script?
Is this in Unity?
When you select the plane does the ‘local’ axis point down the center of the fuselage? Different plane have different pivot points. But usually the pivot point should be at the center of the fuselage near the trailing edge of the wings - in the center of the two wings.
There are a couple planes where the pivot point is forward of the trailing edge of the wings, migs and mirages - this is because of the triangular long shape of those models wings.
If the pivot point is oriented incorrectly - the axis is not pointing down the length of the fuselage, it will need to be reset in your 3D authoring tool - or alternately you can parent it to an empty game object after you have positioned the empty game object in the exact spot you want the planes pivot point to be. Then run the empty game object along the path.