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Thread: Sierra Airspeed indicator

  1. #1

    Sierra Airspeed indicator

    A recent IFR cert uncovered a pitot static system leak traced to the
    airspeed indicator.

    My mechanic says that a replacement unit is unavailable and recommends
    rebuilding the existing one. Anyone have a comparable experience or helpful
    suggestion?
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  2. #2

    Sierra Airspeed indicator

    Your original Airspeed Indicator was PN 169-380048-7. This was probably
    superseded by either of the two units used in the 1978 and later C24Rs; PN
    169-380097-1 (standard Airspeed Indicator) and the optional EA5174-101T-BEC
    (the True Airspeed Indicator). None of these units show up in the RAPID
    parts inventory; and even if they did, they would be in the $500 range.

    I'll assume that your A&P has capped the air lines, and is certain that you
    have a leak inside the gauge itself. He should also have removed and
    reinstalled the air line nipples on the back of the instrument, to make sure
    that the threads aren't leaking. Another reported source of air system
    leaks on Sierras has been the gear safety airspeed switch.

    If all that has been done, and you need an overhaul or replacement
    instrument, I would start by calling Gardner Aviation, 866-486-6061. Here
    is their link:

    http://www.gardneraviation.com/inside.html

    Gardner has provided special offers to BAC during the Falcon Field fly-ins
    (KFFC, just southwest of Atlanta). I had them do my last IFR certification,
    and plan to have them do my next one as well. While they had the panel
    open, I had them recondition a couple of my instruments that had fogged
    lenses. They did an excellent job on everything, and for a very reasonable
    price.

    Two other reported shops are Rudy Instrument repair in Rudy AR (I have no
    phone number), and Kansas Instruments (888-603-5477). The latter has
    received many good references, and one bad one that I know of. They redid
    one owner's airspeed with the wrong face ranges, and had to re-do it. They
    also missed their turnaround time estimates on both turns. All their other
    references have been good, so this may have just been an unfortunate quirk.

    Please let me know how you make out on this, so we can update the BAC
    reference material.


    -----Original Message-----
    From: bac-mail-bounces@beechaeroclub.org
    [mailto:bac-mail-bounces@beechaeroclub.org] On Behalf Of Pdblauner@aol.com
    Sent: Friday, November 18, 2005 7:17 PM
    To: bac-mail@beechaeroclub.org
    Subject: [BAC-Mail] Sierra Airspeed indicator

    A recent IFR cert uncovered a pitot static system leak traced to the
    airspeed indicator.

    My mechanic says that a replacement unit is unavailable and recommends
    rebuilding the existing one. Anyone have a comparable experience or
    helpful
    suggestion?
    _______________________________________________
    BAC-Mail mailing list
    BAC-Mail@beechaeroclub.org
    http://www.beechaeroclub.org/mailman/listinfo/bac-mail



    _______________________________________________
    BAC-Mail mailing list
    BAC-Mail@beechaeroclub.org
    http://www.beechaeroclub.org/mailman/listinfo/bac-mail

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