Re: First the AI, then the DG, then...?

Jay Honeck <[EMAIL PROTECTED]> wrote:
: Short of replacing the vacuum pump itself (which is still working fine), is
: there anything else I should be watching?

As others have said, check the accuracy of the vac gauge, because extra-high
vacuum will make the gyros "over-rev" and wear their bearings quite quickly.

You might want to look at the inline filter STC that inserts a filter in the 
suction line between the regulator and the vacuum pump. The theory is that 
if the pump fails, the carbon vanes blow up into dust which gets sucked back
into the lines and instruments by residual vacuum. This in-line filter 
supposedly traps all of that carbon dust, preventing the lines, regulator,
and instruments from becoming contaminated. When the pump is replaced, the
filter needs to be replaced as well.

As I recall, the same fellow that holds the M-20 air/oil seperator STC holds 
this in-line vacuum filter STC. 

-- 
Aaron Coolidge (N9376J)