With the recent spate of Cirrus accidents, the question arises, "Is it
time for a special certification review?"

In the last twenty years, four general aviation aircraft have been
subjected to special certification review following a series of
accidents. The Cessna 210, Piper Malibu, Beech Bonanza and the
Mitusbushi MU-2.

In each case, pilot training was found to be the highest contributing
issue. In the case of the Bonanza, some structural strengthening was
recommended.