On Aug 18, 3:43 pm, "Douglas Paterson"
wrote:
Still getting to know my new baby (1990 TB-20, normally aspirated 250hp
Lycoming IO-540). I imagine my question here must apply to most non-turbo,
non-FADEC pistons (though I gather there's some sort of altitude compensator
on some airplanes' engines?). I live in Colorado, which means routine
high-elevation airport ops.

The people who manufacture that engine, and who have lots to
lose if it quits on you, have a procedure he

http://www.lycoming.textron.com/supp...fs/SI1094D.pdf

Dan