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In a message dated 3/26/2003 8:37:14 AM Central Standard Time, spdahlgren@attbi.com writes:
Any thoughts or troubleshooting tips?
Scott,
1. Do the vacuum instruments erect? If so, it may be that you have used the wrong vacuum gauge port. Sometimes marked P and V. V does not mean vacuum it means "vent". If I remember correctly, you should be connected to the "P" (pressure) port.
2. Review the vacuum instrument plumbing guide from anywhere, pilot training manual, Aircraft Spruce catalog, airplane construction manual. make sure that air is sucked thru filter, then instruments, regulator and on to "in" of the vacuum pump and that all connections are sound.
3. check that both vacuum instrument's "gage" ports are proper. One instrument's to the vacuum gauge and the other instrument's is plugged.
4. Check that air is actually blowing out of the pump at the port marked "out". Also that the pump is rotating in the correct direction (arrow on pump case matches engine accessory information).
If none of this helps, consider an all electric panel :-)
Scott Krueger
Sky2high@aol.com
LNC2 N92EX IO320 Aurora, IL (KARR)
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