Today's Message Index:
----------------------
1. 06:55 AM - Encoder Certification ()
2. 09:44 AM - Re: Encoder Certification (Kevin Carey)
3. 03:38 PM - Re: Encoder Certification (Greg Young)
Message 1
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| Subject: | Encoder Certification |
1/25/2010
Hello Angier Ames, You wrote 1) 2) and 3) below:
1) "Altitude encoders are required equipment for IFR flight in controlled
airspace."
{Response} Not true for all controlled airspace -- just that airspace
identified in 91.215 (b). Can you show otherwise?
2) "And unless the operation is conducted under part 121 or 135, as per
FARS, 14CFR Section215(a), they do NOT need to be certified/ TSO'd."
{Response} Not true because 14 CFR Section 215 (a) says exactly the
opposite. Read here:
"91.215 ATC transponder and altitude reporting equipment and use.
(a) All airspace: U.S.-registered civil aircraft. For operations not
conducted under part 121 or 135 of this chapter, ATC transponder equipment
installed must meet the performance and environmental requirements of any
class of TSO-C74b (Mode A) or any class of TSO-C74c (Mode A with altitude
reporting capability) as appropriate, or the appropriate class of TSO-C112
(Mode S)."
3) "So, go to your basement and create your own altitude encoder. Your only
obligation under Part 91 is to demonstrate that it meets the performance and
environmental standards of any class of TSO-C47b or c or TSO-C112."
{Response} More than a bit misleading. The FAA requirements of proving "the
performance and environmental standards" of a TSO, or an alternate method of
complying with the requirements, for avionics are very extensive, demanding,
and expensive. This is why most of the altitude encoding EFIS' available to
the experimental amateur built community are not TSO'd. There is extensive
material in the aeroelectric list archives on the significance of
paragraph14 CFR 91.217, particularly 91.217 (b). Just help yourself.
'OC' Says: "The best investment we can make is the effort to gather and
understand knowledge."
========================================================
Time: 07:07:12 AM PST US
From: "Greenbacks, UnLtd." <N4ZQ@comcast.net>
Subject: AeroElectric-List: Re: Encoder Certification
Since we are all now exhausted by this subject, lets beat this dead
horse one more time.
Altitude encoders are required equipment for IFR flight in controlled
airspace. And unless the operation is conducted under part 121 or 135,
as per FARS, 14CFR Section215(a), they do NOT need to be certified/
TSO'd.
So, go to your basement and create your own altitude encoder. Your
only obligation under Part 91 is to demonstrate that it meets the
performance and environmental standards of any class of TSO-C47b or c
or TSO-C112.
Angier Ames
N4ZQ
Message 2
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| Subject: | Re: Encoder Certification |
/set mode = "dead horse"
/enable beat
On Jan 25, 2010, at 9:35 AM, <bakerocb@cox.net> wrote:
>
> 1/25/2010
>
> Hello Angier Ames, You wrote 1) 2) and 3) below:
>
> 1) "Altitude encoders are required equipment for IFR flight in
> controlled airspace."
>
> {Response} Not true for all controlled airspace -- just that
> airspace identified in 91.215 (b). Can you show otherwise?
>
> 2) "And unless the operation is conducted under part 121 or 135, as
> per FARS, 14CFR Section215(a), they do NOT need to be certified/
> TSO'd."
>
> {Response} Not true because 14 CFR Section 215 (a) says exactly the
> opposite. Read here:
>
> "91.215 ATC transponder and altitude reporting equipment and use.
>
> (a) All airspace: U.S.-registered civil aircraft. For operations not
> conducted under part 121 or 135 of this chapter, ATC transponder
> equipment installed must meet the performance and environmental
> requirements of any class of TSO-C74b (Mode A) or any class of TSO-
> C74c (Mode A with altitude reporting capability) as appropriate, or
> the appropriate class of TSO-C112 (Mode S)."
>
> 3) "So, go to your basement and create your own altitude encoder.
> Your only obligation under Part 91 is to demonstrate that it meets
> the performance and environmental standards of any class of TSO-C47b
> or c or TSO-C112."
>
> {Response} More than a bit misleading. The FAA requirements of
> proving "the performance and environmental standards" of a TSO, or
> an alternate method of complying with the requirements, for avionics
> are very extensive, demanding, and expensive. This is why most of
> the altitude encoding EFIS' available to the experimental amateur
> built community are not TSO'd. There is extensive material in the
> aeroelectric list archives on the significance of paragraph14 CFR
> 91.217, particularly 91.217 (b). Just help yourself.
>
> 'OC' Says: "The best investment we can make is the effort to gather
> and understand knowledge."
>
> ========================================================
>
> Time: 07:07:12 AM PST US
> From: "Greenbacks, UnLtd." <N4ZQ@comcast.net>
> Subject: AeroElectric-List: Re: Encoder Certification
>
> Since we are all now exhausted by this subject, lets beat this dead
> horse one more time.
> Altitude encoders are required equipment for IFR flight in controlled
> airspace. And unless the operation is conducted under part 121 or 135,
> as per FARS, 14CFR Section215(a), they do NOT need to be certified/
> TSO'd.
>
> So, go to your basement and create your own altitude encoder. Your
> only obligation under Part 91 is to demonstrate that it meets the
> performance and environmental standards of any class of TSO-C47b or c
> or TSO-C112.
>
> Angier Ames
> N4ZQ
>
>
Message 3
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| Subject: | Encoder Certification |
<LOOP UNTIL Reader.Count = 0>
/set mode = "dead horse"
/enable beat
</LOOP>
> On Jan 25, 2010, at 9:35 AM, <bakerocb@cox.net> wrote:
>
> >
> > 1/25/2010
> >
> > Hello Angier Ames, You wrote 1) 2) and 3) below:
> >
> > 1) "Altitude encoders are required equipment for IFR flight in
> > controlled airspace."
> >
> > {Response} Not true for all controlled airspace -- just
> that airspace
> > identified in 91.215 (b). Can you show otherwise?
> >
> > 2) "And unless the operation is conducted under part 121 or 135, as
> > per FARS, 14CFR Section215(a), they do NOT need to be certified/
> > TSO'd."
> >
> > {Response} Not true because 14 CFR Section 215 (a) says exactly the
> > opposite. Read here:
> >
> > "91.215 ATC transponder and altitude reporting equipment and use.
> >
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