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recapen(at)earthlink.net
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 Posted: Fri Jun 08, 2012 6:11 am Post subject: Bi-ennial transponder/encoder/static certifications |
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In reading 91.411 and 91.413, it says the manufacturer of the airplane can perform the tests.
Since I built my 6A, I'm thinking that I cando the tests myself and make the logbook entry.
Testing the transponder codes might be the difficult part - but I have already built the test equipment and tested the Pitot-static system and verified the altitude goung to the transponder is correct.
Thoughts please,
Ralph
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bakerocb
Joined: 15 Jan 2006
Posts: 727
Location: FAIRFAX VA
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| Posted: Sat Jun 09, 2012 5:13 am Post subject: Bi-ennial transponder/encoder/static certifications |
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6/9/2012
Hello Ralph Capen, Kelly McMullen has given you some good words on this
subject, but I would like to clarify one point.
Kelly wrote: "You can leak test your static system if you ever need to open
it between
the required certifications, and that is legal, ......"
This is true only if you meet one of the qualification requirements listed
in paragraph 91.411 (b). See a copy of that paragraph below:
"91.411 Altimeter system and altitude reporting equipment tests and
inspections.
(a) No person may operate an airplane, or helicopter, in controlled airspace
under IFR unless-
(1) Within the preceding 24 calendar months, each static pressure system,
each altimeter instrument, and each automatic pressure altitude reporting
system has been tested and inspected and found to comply with appendices E
and F of part 43 of this chapter;
(2) Except for the use of system drain and alternate static pressure valves,
following any opening and closing of the static pressure system, that system
has been tested and inspected and found to comply with paragraph (a),
appendix E, of part 43 of this chapter; and
(3) Following installation or maintenance on the automatic pressure altitude
reporting system of the ATC transponder where data correspondence error
could be introduced, the integrated system has been tested, inspected, and
found to comply with paragraph (c), appendix E, of part 43 of this chapter.
(b) The tests required by paragraph (a) of this section must be conducted
by-
(1) The manufacturer of the airplane, or helicopter, on which the tests and
inspections are to be performed;
(2) A certificated repair station properly equipped to perform those
functions and holding-
(i) An instrument rating, Class I;
(ii) A limited instrument rating appropriate to the make and model of
appliance to be tested;
(iii) A limited rating appropriate to the test to be performed;
(iv) An airframe rating appropriate to the airplane, or helicopter, to be
tested; or
(3) A certificated mechanic with an airframe rating (static pressure system
tests and inspections only)."
Note that holding only a Repairman's Certificate for a specific experimental
amateur built aircraft is not listed as one of the persons qualified to
perform static pressure system tests and inspections (in order to detect a
leak) on the aircraft that he is rated for.
Please let me know if you have any questions on this subject.
'OC' Baker Says: "The best investment we can make is the time and effort to
gather and understand knowledge."
PS: It is possible that some FAA employee has given the OK for some
Repairman to perform a static pressure system leak test on his experimental
amateur built aircraft, but that does not constitute a universal change the
regulation.
Besides what equipment and test performance criteria would the Repairman use
to determine whether or not he had an acceptable leak? Hint: The answer to
this question can be found in the Matronics aeroelectric list archives.
(Search for "static check" dated Sep 11)
===========================================================
| Quote: | From: Kelly McMullen <kellym(at)aviating.com>
Sent: Jun 8, 2012 10:22 AM
To: avionics-list(at)matronics.com
Subject: Re: Bi-ennial transponder/encoder/static
certifications
A common misconception. Yes you built your aircraft. That does not make
you a "manufacturer" in the terms of these regulations.
You need the transponder certified by someone with a repair station
license. There is no certification of the pitot system, only the static
system. The only reason the pitot is connected to the test is to protect
your airspeed indicator from an excessive pressure difference with the
static port.
You can leak test your static system if you ever need to open it between
the required certifications, and that is legal, but the certification
must be done by an appropriately rated repair station.
Kelly McMullen
A&P/IA, EAA Tech Counselor
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============================================
| Quote: |
On 6/8/2012 6:46 AM, Ralph E. Capen wrote:
>
> <recapen(at)earthlink.net>
>
> In reading 91.411 and 91.413, it says the manufacturer of the airplane
> can perform
the tests.
|
| Quote: | >
> Since I built my 6A, I'm thinking that I cando the tests myself and make
> the
logbook entry.
|
| Quote: | >
> Testing the transponder codes might be the difficult part - but I have
> already
built the test equipment and tested the Pitot-static system and verified the
|
altitude goung to the transponder is correct.
| Quote: | >
> Thoughts please,
> Ralph
|
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