From your resume, your interviewer likely won't be able to get the specific details on what types of aircraft you have worked with throughout your training and your career. This question will allow them to learn a little bit more about your experience. As you answer, be open and honest about all of the types of aircraft you are familiar with. Be sure to tie any experience that you have to the role you are interviewing for. If you don't have experience working on large aircraft like Airbus or Boeing passenger planes, that is okay. If that is the case, try to relate your training and experience to this point in your career to future success working with larger aircraft.