Hello, I am Bryan Eakins and own N112MB, 112A, SN: 219. I live just north of CLT but the airplane is down at Auburn, AL with my two boys who are flying it. They are have some A/S, VSI flucuations and so I want to have them drain the static system. Not being down there can you give me some advice on the procedure. The maintenance manual just calls it a “sump tube”. Thanks (704) 996-3761