Cirrus... is it time for certification review?

"Happy Dog" wrote in message
m...
"Dave Stadt" wrote
One might say that the fatal accident rate seems disproportionate
(50% of the SR20, 25% for the SR22 versus 10% for the 172 and 20%
for the 182), but at the sample sizes present, there's absolutely no
reasonable way to draw any valid statistical conclusion (and note
that for the SR22 and the 182, the rates are actually similar).

Apples and oranges. The 182 fleet is many times larger than the SR22
fleet. And the 172 fleet is near infinite compared to the Cirrus
fleet. The numbers look pretty bad for Cirrus.

Did you adjust for the kind of flying done by each? No, you didn't.

The flights all involve an equal number of takeoffs and landings only
some are more successfull in the landing department than others.

Unless you wish to redefine "flight" , no, they don't. Are circuits
"flights"?

I suspect so. Unless one just motors around on the ground in a big
rectangle.

Which would be redefining "circuits". So the flights don't "all involve
an equal number of takeoffs and landings".

They most certainly do. How can one make one takeoff and less than or more
than one associated landing, excluding the occasional bounce.

Your desire to engage in semantics
aside, Cirruses are not training aircraft.

Why not. I suspect with the insurance requirements involved they are used
quite frequently in a training environment.

So a direct comparison of
"numbers" is really telling us enough about the safety of each plane.
Either way.

moo