September 2011 Issue
Letters: September 2011
Re your article on going vacuumless in the June 2011 issue, when I bought my new Columbia 300 in 2002, it came from the factory as a traditional six-pack with a vacuum AI (KI-256). In November 2008, I embarked on an upgrade to the Aspen EFD1000 Pro using Lancaster Avionics in Lancaster, Pennsylvania. (They are awesome.) I chose to install the Mid-Continent Life Saver electric attitude gyro with battery backup as my backup AI. As part of the upgrade, I wanted to remove the vacuum system because it would no longer power any instruments. Initially, we were led to believe that we would be able to remove the vacuum system with local FSDO approval. It turns out this was not possible because the vacuum system is on the type certificate. It had to go through the ACO that controlled the type certificate.
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