What can be done to appease CASA and perhaps save Jabiru?
1. Determine things called “facts”.
Is there a problem at all?
All machines break. Are Jabiru engines failing at a higher rate than other engines, or are there more Jabiru engines operating more hours, and the rate of failure has remained the same? It may be that the rate has remained the same, but there are more failures because there are more engines operating more hours.
Even if the rate of failure has increased, is that a problem? Have there been any serious injuries, fatalities or property damage? If not, what is the “problem”, other than the cognitive bias of punters?
2. Assuming there is a problem, determine a thing called the “cause”.
If some of the folklore-driven thinking evident in this thread is typical of the approach that will be taken by the manufacturer and CASA, Jabiru is, as a business, as good as dead. Let’s hope against hope that it isn’t the approach taken.
My suggestion would be to get people like Oracle1, jabba and his APS off-sider, on the job. They understand how engines actually work and how to actually operate them. Then you might have a better chance of nailing down the actual cause of the problem – if there is one – and options for actually dealing with it.
But aviation regulatory decisions in Australia are often unhindered by inconvenient considerations like facts and cause.