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Thread: Garmin GMU-11

  1. #11
    Administrator Steve Pierce's Avatar
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    Default Re: Garmin GMU-11

    Quote Originally Posted by Rotormech View Post
    Thank you for the responses gentlemen. Steve - on the ones you have seen in the wing, what sort of attach methods were used?


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    I have one of those new Carbon Cub FX3s in the shop with a G3X in the panel and will get a picture of the magnetometer installation today.

  2. #12
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    Default Re: Garmin GMU-11

    Quote Originally Posted by Stephen View Post
    I like it! But, can it be used in certified aircraft?
    I think so, as long as it doesnít replace a required instrument.

    In a VFR panel, couldnít you install under the NORSEE guidance? Link: http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgPolicy.nsf/0/1790b02f1833357486257f9200592110/$FILE/PS-AIR-21.8-1602.pdf

    Iím not an IA, so my opinion there doesnít carry much, but it makes sense to me.

  3. #13
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    Default Re: Garmin GMU-11

    Quote Originally Posted by CamTom12 View Post
    I think so, as long as it doesnít replace a required instrument.

    In a VFR panel, couldnít you install under the NORSEE guidance? Link: http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgPolicy.nsf/0/1790b02f1833357486257f9200592110/$FILE/PS-AIR-21.8-1602.pdf

    Iím not an IA, so my opinion there doesnít carry much, but it makes sense to me.
    "Making Sense to" unfortunately doesn't do much when working with many FSDO inspectors.....
    "Progress is our most important problem"

  4. #14

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    Default Re: Garmin GMU-11

    Quote Originally Posted by CamTom12 View Post
    I think so, as long as it doesn’t replace a required instrument.

    In a VFR panel, couldn’t you install under the NORSEE guidance? Link: http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgPolicy.nsf/0/1790b02f1833357486257f9200592110/$FILE/PS-AIR-21.8-1602.pdf

    I’m not an IA, so my opinion there doesn’t carry much, but it makes sense to me.
    The way I read that document, it only deals with design and manufacturing. It might be used to argue installation but I didn’t see where it specifically addresses installation approval. Isn’t there a document that specifically addresses equipment that could fall into this category? I had a Cardinal owner checking it out a couple of years ago because he was thinking about an AOA indication system and I am seeing more and more items advertised as secondary or backup.
    "Good judgement comes from experience, and experience comes from bad judgement." - Fred Brooks

  5. #15

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    Default Re: Garmin GMU-11

    It isn’t what I was looking for but this link is to a document that is a year newer and specifically addresses installation of NORSEE components under item H:
    http://fsims.faa.gov/wdocs/8900.1/v0...04_014_017.htm
    "Good judgement comes from experience, and experience comes from bad judgement." - Fred Brooks

  6. #16
    Zac Weidner's Avatar
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    Default Re: Garmin GMU-11

    Quote Originally Posted by Rotormech View Post
    Thank you for the responses gentlemen. Steve - on the ones you have seen in the wing, what sort of attach methods were used?


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    Again, not on a shortwing, but I had to fabricate a bracket for the mount. The hard part is getting it fabricated and installed level(with airplane leveled) within 2į either way. Iíd think you could easily make a bracket that fastens to the spar nice and level since Iíd imagine the spar is very close to vertical.


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  7. #17
    Administrator Steve Pierce's Avatar
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    Default Re: Garmin GMU-11

    Cub Crafters installed it on the back side of the rear spar out board of the lift struts. Bracket is attached with two machine screws and nuts through the spar web.
    IMG_20190111_164923.jpgIMG_20190111_164541.jpgIMG_20190111_164948.jpg

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  8. #18
    Gilbert Pierce's Avatar
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    Default Re: Garmin GMU-11

    Loooks like the double nutted or is that a reflection? Doesnít look like they got the holes in the neutral axis. Thatís where I would have put them.

  9. #19
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    Default Re: Garmin GMU-11

    Thanks Steve, donít think I could legally install it that way under Garminís STC though. Your thoughts?

    Gilbert - sure looks double nutted to me. Most likely brass hardware as well.


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  10. #20
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    Default Re: Garmin GMU-11

    F. Atlee Dodge - SA144ALInstallation of Remote Compass Bracket. This could work, but when I spoke with them at Oshkosh, they said the STC spells out a specific flux valve to be used.


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