Okay, first things first, to use the addon, you'll need to turn on 'Beta APIs' in your world settings for the planes to work.

To craft the plane, it takes 5 items.
1 Plane Base - 2 minecarts and 7 oak planks.

1 Plane Propeller - 4 white wool and 1 block of coal.

1 Plane Tail - 6 white wool and 1 oak plank.

2 Plane Wings - 6 white wool, 1 phantom membrane, and 2 oak logs.

The plane takes fuel too, it takes 1 of either Coal or Charcoal every 5 seconds to run.

To fuel the plane, put the fuel in the planes inventory. (like a donkey)
If you put TNT in the plane, the plane will drop 1 TNT every 10 seconds while flying.

The plane also explodes on death. (it will delete items like a normal explosion, but it won't break blocks.)

To pickup the plane, first make sure you're the owner o it by getting in the plane's seat atleast once.

After being the owner of the plane, you can then shift and interact with the plane to pick it up. It will drop the items in the plane--

--when picked up.

the plane can be seen in action here: