Airplane crash detection help

I have a basic game where I can fly around and turn in my jet. I am using transform.translate to make it go forwards and transform.rotate to make it turn. I have randomly generated terrain (I improved someone elses script). I want to make it so that when I collide with the terrain I can call a function. Also I have a rigidbody on my plane.

Here is my crash script:

 using UnityEngine;
 using System.Collections;
 
 public class Crash : MonoBehaviour {
     
     void OnCollisionEnter(Collision collision) {
         
         if(collision.gameObject.name == "Terrain Plane(Clone)")
         {
             Debug.Log ("Crash");
         }
     }
     
 }