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Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
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 Posted: Mon Jul 13, 2020 3:18 pm Post subject: Static system tests |
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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.
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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
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ornerycuss2001(at)protonm
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| Posted: Mon Jul 13, 2020 4:53 pm Post subject: Static system tests |
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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 <kellym(at)aviating.com> wrote:
| Quote: |
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.
|
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http://www.matronics.com/Navigator?AeroElectric-List |
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