vacuum pumps

[Dale Campbell]

I have a friend that lives in Alaska that installed a Emergancy Vacuum sorce on his Lycoming engine. It was a cable operated valve on the intake manifold plus a hose and a tee in parallel to the vacuum pump, that he could operated from the cockpit. If the pump failed he could open the valve & keep the vacuum intsruments working until he got back on the ground and thats what it is all about.