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Thread: altitude encoder ?

  1. #11
    Stephen's Avatar
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    Nov 2007
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    Lopez Island, WA
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    Default Re: altitude encoder ?

    Was this the 978 lite version?

    Comes with WAAS gps, certified, prices seem to range.

    Are they sold direct to allow any qualified person to install? Or, must the work be done by a radio shop?
    "You can only tie the record for flying low."

  2. #12
    Homer Landreth's Avatar
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    Nov 2007
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    Peoria Arizona
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    Default Re: altitude encoder ?

    Quote Originally Posted by Stephen View Post
    Was this the 978 lite version?

    Comes with WAAS gps, certified, prices seem to range.

    Are they sold direct to allow any qualified person to install? Or, must the work be done by a radio shop?
    The unit can be INSTALLED by an A/P but the testing of it after installation is governed by:

    91.413 ATC transponder tests and inspections.
    (a) No persons may use an ATC transponder that is specified in 91.215(a), 121.345(c), or 135.143(c) of this chapter unless, within the preceding 24 calendar months, the ATC transponder has been tested and inspected and found to comply with appendix F of part 43 of this chapter; and

    (b) Following any installation or maintenance on an 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.

    (c) The tests and inspections specified in this section must be conducted by—

    (1) A certificated repair station properly equipped to perform those functions and holding—

    (i) A radio rating, Class III;

    (ii) A limited radio rating appropriate to the make and model transponder to be tested;

    (iii) A limited rating appropriate to the test to be performed;

    Also, if you are going to,or do. fly IFR there are additional tests required. The verbiage "data correspondence error could be introduced" is pretty broad and just opening the static system is usually part and parcel to this potential.
    Last edited by Homer Landreth; 10-11-2017 at 01:12 AM.

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