- Oct 17, 2019
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Vacuum/boots help- for those with boots that have removed a vacuum system for glass panel. Did you cap off the line to the AI/HSI gyro instruments(item 12 on the Piper service manual) and keep the rest of the system intact? If so, what happened to the panel vacuum gauge and the master caution panel vacuum warning light? We are looking at removal of all vacuum flight instruments but have deice boots (Seneca IV). The installer says the AI is a required instrument in the vacuum line to keep the pressures and gauge accurate. But another mechanic says with the vacuum manifold that all you have to do is cap off the lines to the old gyro instruments. I can see where capping the line to the panel instruments would keep the air pump/vacuum intact, but wouldn't you lose the panel vacuum gauge? What about the master caution panel?