Oh, Herro!
No, it just means with ANY LUCK AT ALL, you should land on the TIRES... not anything else....
I used to hear "Keep the Greasy Side Down", too.
I guess your Cutie Jane doesn't HAVE rubber on her skids, so it wouldn't make an ounce of sense to you. Sorry!! There I go again... living in the narrow world of the stuck-wing folks.
Cheers!!!!