We fly all the time w/ our bikes. Just returned yesterday from an out of stat MS 150 ride. Now we have hard cases and they come w/ foam and packing instructions.
Some airports have LARGER x-ray machines and no opening of case is required.
I believe you said you were shipping...do pack well! Foam egg crate mattress pads are good, too. Belive it or not, I have only had minor damage with all my travels and shipping was where it happened. When we "fly" w/ the bikes...no problemo!
Like everyone said, pad things, don't let anything be lose AND no "rubbing".
You LBS may help you...ours did the first time we had to do this!
Have fune.