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John H Murphy
Joined: 03 Jan 2007
Posts: 78
Location: Henderson, NV
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 Posted: Sat Dec 08, 2007 11:03 pm Post subject: AN hardware - Is there a replacement schedule or useful life |
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The AN hardware that attaches the wings, wing struts, tail feathers, etc. Is there a useful life for this hardware? My aircraft is about 7 years old.
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planecrazzzy
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| Posted: Sun Dec 09, 2007 9:13 am Post subject: Re: AN hardware - Is there a replacement schedule or useful |
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Maybe there's some kind of info under army/navy bolts ???
Seems like if they show "wear" they could use replacing....
So far on mine....The a/n stuff looks good, the hole is what gets the wear.
Gotta Fly...
Mike & "Jaz" in MN
Building a plane in a WARM Garage...
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gaman(at)att.net
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| Posted: Sun Dec 09, 2007 1:33 pm Post subject: AN hardware - Is there a replacement schedule or useful life |
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This may be unusual,but on the right side horizontal leading edge support on my MK-3,I had looseness in that connection.I got rid of almost all of the slop by replacing the AN-3 bolt.It had wear where it contacted the stainless bracket.The bolts are tough but not hard.If you can feel or see wear,replace them.
G.Aman MK-3C Jabiru 2200 290 hrs
planecrazzzy <planecrazzzy(at)yahoo.com> wrote:
Maybe there's some kind of info under army/navy bolts ???
Seems like if they show "wear" they could use replacing....
So far on mine....The a/n stuff looks good, the hole is what gets the wear.
Gotta Fly...
Mike & "Jaz" in MN
Building a plane in a WARM Garage...
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Sun Dec 09, 2007 3:25 pm Post subject: AN hardware - Is there a replacement schedule or useful life |
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G.Aman:
I believe most of the initial wear on AN bolts is loss of the cadmium plating. It acts as a protector and lube. It is pretty soft and wears off the bolts that get slippage and vibration.
john h
mkIII
[quote]
I got rid of almost all of the slop by replacing the AN-3 bolt.It had wear where it contacted the stainless bracket.The bolts are tough but not hard. G.Aman MK-3C Jabiru 2200 290 hrs
[b]
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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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gaman(at)att.net
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| Posted: Mon Dec 10, 2007 7:06 am Post subject: AN hardware - Is there a replacement schedule or useful life |
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Thanks John,never suspected that.A friend of mine used to mention helicopter grade bolts.Said they were different from normal AN hardware.Any truth to that?
John Hauck <jhauck(at)elmore.rr.com> wrote:[quote] G.Aman:
I believe most of the initial wear on AN bolts is loss of the cadmium plating. It acts as a protector and lube. It is pretty soft and wears off the bolts that get slippage and vibration.
john h
mkIII
[quote][b]
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Mon Dec 10, 2007 7:38 am Post subject: AN hardware - Is there a replacement schedule or useful life |
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Morning Gary:
Don't think their is any difference in grades of AN hardware used on fixed or rotary wing aircraft.
What your friend may have been talking about is close tolorance bolts. They are used more on rotary wing than fixed.
john h
mkIII
[quote] ---
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John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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Guy Morgan
Joined: 03 Jun 2006
Posts: 9
Location: Galveston, TX
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| Posted: Mon Dec 10, 2007 7:54 am Post subject: AN hardware - Is there a replacement schedule or useful life |
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<?xml:namespace prefix="v" /><?xml:namespace prefix="o" /><![endif]--> Nope, same thing.
Best Regards,
Guy Morgan
Evergreen Helicopters
2001 Terminal Dr.
Galveston, TX 77554
[quote] ---
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jb92563
Joined: 23 Mar 2007
Posts: 314
Location: Southern California
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| Posted: Mon Dec 10, 2007 1:15 pm Post subject: Re: AN hardware - Is there a replacement schedule or useful |
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Wear is the primary parameter for replacement of AN hardware.
Looseness is an indicator as is any darkish accumulations around the joint(Vibration induced wear particles)
Keep in mind that you do not want to use sticky lubricants in any areas on an open aircraft like a Kolb because invariably dirt and grit will stick to the goo and act like sandpaper in your joints, and accelerate the rate of wear on your parts. Especially not on any hinges or parts of the control system.
Dry Lubes are the way to go where you can.
Just for fun, when you go the store to get some new AN hardware, ask to get you some of the really "Fresh" AN hardware that he keeps for special customers. 
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Ray
Kolb UltraStar (Cuyuna UL-202)
Moni MotorGlider
Schreder HP-11 Glider
Grob 109 Motorglider
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gaman(at)att.net
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| Posted: Mon Dec 10, 2007 3:19 pm Post subject: AN hardware - Is there a replacement schedule or useful life |
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John,
Thats the term he used,close tolerance,Thanks Guy.
John Hauck <jhauck(at)elmore.rr.com> wrote:[quote] Morning Gary:
Don't think their is any difference in grades of AN hardware used on fixed or rotary wing aircraft.
What your friend may have been talking about is close tolorance bolts. They are used more on rotary wing than fixed.
john h
mkIII
[quote] ---
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