Excellent question, Blueyonda.
It again highlights the fundamental flaw in the structure of aviation regulation in Australia.
CASA is not competent to decide what the acceptable risk is.
The decision is a political decision, not a technical decision.
The decision requires consideration of matters that CASA does not know and cannot find out.
The only option CASA has to deal with “safety” issues is to make the standards ever-more-stringent, without knowing or caring about the opportunity costs.
ATSB could dust off the junk science that was the original investigation into the Whyalla tragedy. Perhaps Jabiru engines have over-dosed on lead oxybromide and swirl marks on the top of the pistons…
