Need help in making my plane to do Yaw

This is what I have wrote to tilt my airplane while going left and right
values of variables used in script after trial and error are

(i.e. its doing Rotation but not yaw …I want to do Yaw also )

public float _y_movement= -1.0f;
public float _z_movement=-1.0f;
public float _rotateSpeed=0.05f;

Quaternion temp_rotate0 = new Quaternion(0.0f, (Input.GetAxis(“Vertical”) / 4) * _y_movement, (Input.GetAxis(“Horizontal”) / 4) * _z_movement, 1.0f);

transform.rotation = Quaternion.Lerp(transform.rotation, temp_rotate0, Time.deltaTime * _rotateSpeed);

With this My plane is doing tilting to left and right But I want my plane to even face left nd right little bit respectively i.e. I want my plane to do yaw

So what should i add to this to make it doing Yaw ?

woa woa woa, why not just make an animation, when you push left play the tilt left animation.

this method even allows for easy tweaking

if your going to animate please note that you will run into troubles if your animated object is not parented to a null object(dummy box) plus it’s alot easier to work with as during an animation the rotation of an object seems to be taken very literal, not allowing for rotational changes unless done on a parent