If you want to do something when the plane hits the ground (rather than just colliding) you need to use a check to see if its happened - otherwise collisions just do their thing:
put this in your main loop, after you update the position of the plane.
This is assuming you have set the entities plane and ground like this earlier on in the code:
EntityType plane, 2
EntityType ground, 4
If EntityCollided(plane, 4)) then ... code here .... End If
put this in your main loop, after you update the position of the plane.
This is assuming you have set the entities plane and ground like this earlier on in the code:
EntityType plane, 2
EntityType ground, 4