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Thread: control yoke replacement

  1. #1

    control yoke replacement

    Special procedure...no. But since this is part of the flight control
    system an approved mechanic needs to review and sign off. It is not
    approved for "owner maintenance".

    I believe the pins are taper pins but I have not viewed this page of
    the IPC for a while.

    --- In musketeermail@yahoogroups.com, Jack Clute <sierra79us@y...>
    wrote:
    >
    > I have purchased a new control yoke for my sierra. It looks like
    there are only two (2) pins holding mycontrol yoke to the shaft. Does
    anyone know if there is a special procedure to remove and replace
    these pins and are the pins reusable. Thanks
    >
    > J. Clute N6016Y
    >







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  2. #2

    control yoke replacement

    >I have purchased a new control yoke for my sierra. It looks like there are
    >only two (2) pins holding mycontrol yoke to the shaft. Does anyone know if
    >there is a special procedure to remove and replace these pins and are the
    >pins reusable.

    They are AN 386 Taper Pins, and work by having the hole reamed with a
    special tapered reamer (Brown & Sharp taper), and then the pin is pressed
    into the hole and the washer and nut started on the threaded end to secure
    the pin.

    Yes the pins are reusable. The procedure to remove them is to take the nut
    and washer off and then press the pin such that it backs out of the
    taper. A C-clamp with a spacer over the unthreaded end of the pin work
    nicely. The spacer can be put over the threaded end when it comes time to
    re-install the pin.

    As mentioned by others, the disconnection of the primary flight controls
    must be supervised by an A&P and a proper return to service entry in the
    logs made upon completion.

    Here are some links that may give a better understanding:

    http://www.aircraft-tool.com/shop/de....aspx?PageNo=1

    http://www.aircraftspruce.com/catalo...perpinwshr.php

    http://www.aircraftspruce.com/catalo...86taperpin.php

    Bob Steward, A&P IA
    Birmingham, AL



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  3. #3

    control yoke replacement

    Bob's response addresses the forward end of the yoke shaft, where it is pinned to the universal coupling. That is a natural response, since yokes are seldom separated from their shafts.

    However, if you are talking about separating the yoke itself from its shaft, those are structural rivets. They must be carefully drilled out, and just as carefully replaced; the holes must not be elongated. They are not reusable. Whether you have the large-necked shaft, or the one that is tapered on both ends, there is a mating stub that is structurally bonded into the yoke itself. That is the part that is riveted into the yoke shaft.


    ---------- Original Message ----------------------------------
    From: Bob Steward <n76lima@mindspring.com>
    Date: Fri, 20 Jan 2006 07:08:30 -0600

    <html><body>


    <tt>
    <BR>
    >I have purchased a new control yoke for my sierra. It looks like there are <BR>
    >only two (2) pins holding mycontrol yoke to the shaft. Does anyone know if <BR>
    >there is a special procedure to remove and replace these pins and are the <BR>
    >pins reusable.<BR>
    <BR>
    They are AN 386 Taper Pins, and work by having the hole reamed with a <BR>
    special tapered reamer (Brown & Sharp taper), and then the pin is pressed <BR>
    into the hole and the washer and nut started on the threaded end to secure <BR>
    the pin.<BR>
    <BR>
    Yes the pins are reusable. The procedure to remove them is to take the nut <BR>
    and washer off and then press the pin such that it backs out of the <BR>
    taper. A C-clamp with a spacer over the unthreaded end of the pin work <BR>
    nicely. The spacer can be put over the threaded end when it comes time to <BR>
    re-install the pin.<BR>
    <BR>
    As mentioned by others, the disconnection of the primary flight controls <BR>
    must be supervised by an A&P and a proper return to service entry in the <BR>
    logs made upon completion.<BR>
    <BR>
    Here are some links that may give a better understanding:<BR>
    <BR>
    <a href="http://www.aircraft-tool.com/shop/detail.aspx?PRODUCT_ID=1BS&ReturnPage=/shop/search_result.aspx?PageNo=1">http://www.aircraft-tool.com/shop/detail.aspx?PRODUCT_ID=1BS&ReturnPage=/shop/search_result.aspx?PageNo=1</a><BR>
    <BR>
    <a href="http://www.aircraftspruce.com/catalog/hapages/an975taperpinwshr.php">http://www.aircraftspruce.com/catalog/hapages/an975taperpinwshr.php</a><BR>
    <BR>
    <a href="http://www.aircraftspruce.com/catalog/hapages/an386taperpin.php">http://www.aircraftspruce.com/catalog/hapages/an386taperpin.php</a><BR>
    <BR>
    Bob Steward, A&P IA<BR>
    Birmingham, AL<BR>
    <BR>
    </tt>


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