---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 07/13/20: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:18 PM - Static system tests (Kelly McMullen) 2. 05:53 PM - Re: Static system tests (ornerycuss2001) ________________________________ Message 1 _____________________________________ Time: 04:18:24 PM PST US From: Kelly McMullen Subject: AeroElectric-List: Static system tests I recently came upon a question that I don't find a clear answer in 91.411 or 91.413. Aircraft in question is either ELSA or E-AMB, built for VFR only. It is based under Mode C veil, and may have need to fly transitions through Class B, so it has to have ADS-B Out. The question is what level, if any, of certification the static system needs to assure that the ADS-B altitude reported is accurate? I am thinking a leak check at a minimum, but don't see any clear requirement. I would appreciate your thoughts on the subject. ________________________________ Message 2 _____________________________________ Time: 05:53:45 PM PST US From: ornerycuss2001 Subject: Re: AeroElectric-List: Static system tests 91.217b requires that the pressure altitude for the transponder and ADSB come from the same source. Finding no other requirement for ADSB by itself it seems reasonable that a static system check for the transponder would be sufficient. I believe ADSB transmits both pressure altitude and GPS altitude. I'm guessing any large discrepancy would be flagged by the ADSB ground system and a (computer generated) letter of correction would be sent to the registered owner. FWIW, I just had my static system and transponder checked (transponder is also the ADSB box) and no separate check was performed for ADSB altitude information. Sent with ProtonMail Secure Email. Original Message On Monday, July 13, 2020 4:12 PM, Kelly McMullen wrote: > > I recently came upon a question that I don't find a clear answer in > 91.411 or 91.413. Aircraft in question is either ELSA or E-AMB, built > for VFR only. It is based under Mode C veil, and may have need to fly > transitions through Class B, so it has to have ADS-B Out. > The question is what level, if any, of certification the static system > needs to assure that the ADS-B altitude reported is accurate? > I am thinking a leak check at a minimum, but don't see any clear > requirement. I would appreciate your thoughts on the subject. ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.