The whole process was quite comfortable and simple. I applied online through their careers website and later received an invitation for an online game-based assessment. The game-based assessment was simple and enjoyable, I excelled but would've preferred a simpler more straightforward approach; however, this will be all the behavioral feedback they will use to develop a profile on you so do mind working through it well. Afterwards, they will review your assessment's profile results in correlation with your application (hence your resume and cover letter) to determine whether you are a fit or not. You'll then be invited to an on-site Assessment Centre (f you've reached this phase you're "already" a company fit). During said Assessment you'll undergo a group project where your personality/behavioral profile should match and where they'll evaluate group dynamics and your ability to develop and execute a strategy to obtain data, employ it and present your results under a time constraint. Afterwards, you'll receive a 100% technical interview which I found to be rather simple if you read up on the matter. There are a total of five (5) subject questions you'll discuss through it with visual aids and whatnot. You don't necessarily have to know the answer right away or even reach it, you do however should demonstrate your thought process by being verbal about your reasoning. Of course, if you do know the answer right away be thorough and cover your bases as they'll propose alternate scenarios on the basis of the answer. They will also help you and guide you to the right answer. Also, you may or may not face more than one of the representatives of your target department, I had two very polite and professional engineers. The whole environment is built for you to not feel the pressure of what's actually going on. They also served tea, coffee, water and snacks and had several breaks arranged between activities. Afterwards, you'll get a chance to talk with current interns about their experience.
Be sure to remember that Airbus recruiters do not want you to fail. Ease off, only good things can come from this process regardless of whether you succeed or not but do keep in mind that if you do not prepare, you will not do well on the technical interview.
Be yourself, prepare and do your best.