Take a look at this as to what happens to 'certified turbos'....an
eyeopener.


FAA ISSUES AIRWORTHINESS CONCERN SHEET ON FOLLOWING TURBOCHARGED CESSNA
MODELS,
T182, T-R182, T206, T207, P210, T210, T303, 320, 335, T337, 340, 401,
402,
411,
414 AND 421. . .

The FAA issued an Airworthiness Concern Sheet (ACS) dated 30 June 2004
due
to
accidents attributed to failure of the turbocharger system.  The FAA is
requesting information on the adequacy of the Pilots Operating Handbook
to
address the inflight loss of the turbocharger system and the maintenance
procedures to address the turbocharger system performance in order to
detect
an
impending failure.  There is a short 30 day comment period.
Included with the ACS is 30 plus pages of service difficulty reports on
turbocharger systems.  Full text of the ACS and related information
supplied
by
the FAA can be seen at http://www.cessna.org/public/turbocharger.pdf