I would agree with Hugmonster. Unless and until accident investigations are conducted by independabt bodies , they are unlikely to use the model proposed by Prof: James Reason , namely that the causes of accidents start , or can start , at a point much removed from the the immediate apparent causes of the accident.
To illustrate this , consider the ANZ crash in Antarctica. It took a Royal Commission to get to the bottom of it . Initial investigations blamed the crew , but closer scrutiny laid blame both on the airline and the NZ regulatory bodies.
If the crew were negligent , then yes of course they should be legally answerable for their actions. However , this of course raises wider questions of corporate responsibility , or even that of the various regulatory bodies who might have failed in their monitoring duties.
Good luck with your paper , you probably see , if you had'nt realised before , that it potentially is a wide-ranging subject , and will keep you hard at it for many nights to come.