Will the ATSB ever be allowed to allocate fatigue as a PRIMARY causal factor? If fatigue is ever involved, the ATSB will find that the crew had an option to refuse the duty, but didn’t. They will then assert that the pilots abandoned their responsibility to maintain a safety first approach. The CEO of the “victim” airline will then appear on TV in a tear jerking, lament laden press conference and rhetorically question how this could ever happen. Naaaaaa, there could be a dozen hull losses with thousands of lives lost, but while CASA is so “accessible” to the airlines, nothing will change. There is big money involved and a willing scapegoat, the future of fatigue management is very safe......and in the airlines favor.