Object resets position on first movement.

I have plane model exported form 3ds, translated in blender.

I attached TTP camera to it as child in hierarchy, and my script attached to plane:

public class PlaneMoveController : MonoBehaviour {
	public float speed = 10.0f;
	// Use this for initialization
	void Start () {
	// Update is called once per frame
	void Update () {
		//move plane forward
		transform.position += transform.forward.normalized * speed * Time.deltaTime;

Starting position of my plane is {100, 50, 100} rotation {0,0,0}. When I start game plane’s position changes to {0,0,0} rotation to {270,0,0}
My scene has 3 objects plane, camera, terrain.

Have you any ideas how to fix it?

It seams that it was part of animation from blender. After turning off problem has disapeared.