While your interviewer likely can tell from your resume and training that you have the technical skills and abilities to change a wheel on an airplane, they are looking to hear about the necessary steps you take to ensure that the task is done safely. On top of the standard safety precautions like chocking the wheels, be sure to also talk about other checks you make on the overall assembly of the wheel, both prior to changing and after changing the wheel. During your interview, you will be tested to ensure that you will bring a safety focused mindset to the British Airways engineering team with questions similar to this.