While most Aviation Accidents are, to some extent, the result of pilot error, there are other factors that need to be considered. Due to the legal doctrine of “strict liability,” the manufacturer can be held liable if the presence of a defect can be proven to be the cause of damage or injury. Defects for which the manufacturer can be held liable can arise from three sources: defects in design, defects in manufacturing, and failure to provide proper warning. It must be kept in mind that liability laws vary from state to state.