Like others have said, no arrest, charge, conviction so would not show up on a normal background check. Airlines do not (99.9% sure) have access to CPB internal records, I have never heard of such a thing.
Also, while airlines will ask about aircraft incidents, they do not ask about customs issues. I would not consider this an aircraft incident since it had nothing to do with the airplane...you could have been driving a boat.
Lori?