While you know that the work of an Aircraft Mechanic can be physically demanding, your interviewer will ideally be looking to hear about the physicality of the work you have performed as a mechanic in previous roles. On top of the frequent standing, walking, carrying, pushing, pulling, and contorting, they'll also be looking to hear that you have no fear of climbing or heights, if hired for this role working on large commercial airplanes. Prior to your interview, it is also wise to read the job posting and/or job description for the role you are interviewing for to see exactly what the physical requirements are for the position so you can speak to them.