The main reason causing fatalities in the event of an air crash is head injury as a result of head impact of occupants to surrounding items in the cabin interiors. Aircraft cabin interiors are divided using bulkheads and head impact with these obstructions form one of the major factors to study the physical measure Head Injury Criteria (HIC). This thesis presents a parametric study conducted on the head paths and head trajectories during a crash using the Federal Aviation Regulations (FAR) Part 25 and Part 23. This thesis also presents a parametric study of the properties of the bulkhead, the...