In the airplane level when you start look to your right.You should see a thing where you put youre luggage on to get it inspected.Ollie on it and you will get to an area where you will find the deck(I also consider the bowl here the best place to get points).To grind the airplane sign you must grind the lights hanging from the roof at the upper end of the second stairway.When you jump to the second light youll see the airport sign right in front of you.Just keep grinding the sign until you get the gap and then land succesfully.

Maybe you could help me.Do *you know where to get the elevator grind and kickflip over the elevator lobby in LA?
I just cant find em.