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From: "Marvin Kaye" <marv@lancaironline.net>
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Posted for "George Braly" <gwbraly@gami.com>:

  Why would you lean a TSIO-550 engine at a field with 5 or 10K density
altitude?
  
  The turbo at redline MP and RPM makes more HP at 5000 feet and 10,000 feet
than it does at sea level.
  
  Not a good time to lean it.
  
  There is an NTSB report on this subject.  A crash at Pagosa Springs from 
some
years ago. P210 leaned on takeoff.  Not a pretty picture.
  
  Regards,  George
  

"""
  Walter:
  
  Any thoughts about leaning the TSIO 550 engine for high altitude
  take-offs.  (5000' +)
  
  Thanks,  Bill Hogarty
"""