Don't wear anything related to a pilot's uniform; that would be very tacky! Pilot's uniforms are for wearing on duty only - and then by employed pilots, not by wannabes! It would be a bit like turning up for a trial at Old Trafford wearing your Man U kit - a bit presumptuous. Or, even worse, turning up at Old Trafford wearing City kit...!
This subject has been covered many times in the past, though I find it difficult to understand why it is open to question. For all interviews, unless instructed otherwise, you should wear a sober suit, a clean, light coloured shirt, and a tie. If the Simpsons are that important to you that the only tie you possess is covered in them, then wear that one - if you can't get to a tie shop first!
Remember, you are attempting to join a conservative, safety-conscious occupation. If you want to impress, don't take risks.
Scroggs