a wrote:
On Jul 15, 12:28Â*am, Ron Wanttaja wrote:
Mxsmanic wrote:
a writes:

It may be selective memory on my part, but it seems these airplanes
have been over represented among GA accidents lately.

They are indeed over-represented.

No. Â*Their accident rate is less than that of Cessna 172s manufactured
over the same time period.

In 2009, there were 23 Cirrus accidents, vs. 3699 aircraft registered as
of January 2010. Â*There were 3003 Cessna 172s on the registry that had
been manufactured since production restarted in the '90s. Â*The NTSB
accident listing for 2009 shows 23 Cessna 172S models and four 172R models.

Cirrus: Â*23/3699 = Â*0.62%

New-Production 172s: Â*27/3003 = 0.89%

Ron Wanttaja

That you compared aircraft and accident rates manufactured in the same
interval -- S model 172s -- very nicely compares apples with apples
in my view. Nice data, nice logic.

Yeah and with rates that low you can not establish any "blame" on the
manufacturer, you are down into the realm of random, stupid pet tricks.


--
Jim Pennino

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