This question gives you the perfect opportunity to set yourself apart from your potential competition for the job. To do this, be sure to research the fine details of the position ahead of the interview, and point out one skill that you excel in that the airline you are interviewing with can really utilize on their team of mechanics. Where you take your answer to this question is totally up to you in the end, as you can talk about on-the-job skills, personality traits, or interpersonal skills. Whichever way you take it, make sure that it sets you apart from your competition for the job and relates to the duties of the job.