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AirMike
Joined: 27 Feb 2007
Posts: 514
Location: Nevada
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 Posted: Tue Sep 06, 2011 6:23 pm Post subject: Horizontal Stabilizer bolts loose at annual |
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I was quite shocked today to find out that the HS bolts (4) on the front of the HS were out of proper torque. This discovered during my annual condition inspection. I would not say that they were loose, but they definitely needed tightening. No apparent fretting. Tightened about one full turn with the torque wrench - wow........
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_________________
See you OSH '18
Q/B - sold. |
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pitts_pilot(at)bellsouth.
Guest
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| Posted: Tue Sep 06, 2011 6:35 pm Post subject: Horizontal Stabilizer bolts loose at annual |
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If you used torque seal you know (1) that you had tightened the bolts at
final assembly and (2) the bolts loosened after being tightened. I'm
using yellow torque seal to make sure that I don't miss any fasteners.
I fill the screwdriver slots on screws that I don't plan on taking out
for access .... like at annual time.
Linn
On 9/6/2011 10:23 PM, AirMike wrote:
| Quote: |
I was quite shocked today to find out that the HS bolts (4) on the front of the HS were out of proper torque. This discovered during my annual condition inspection. I would not say that they were loose, but they definitely needed tightening. No apparent fretting. Tightened about one full turn with the torque wrench - wow........
--------
See you OSH '11
Q/B - flying 1 yr+
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=351613#351613
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AirMike
Joined: 27 Feb 2007
Posts: 514
Location: Nevada
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| Posted: Tue Sep 06, 2011 7:59 pm Post subject: horizontal Stabilizer bolts loose at annual |
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My alert was the fractured torque seal. Torque seal is a MUST do on all critical airframe and engine nuts.
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_________________
See you OSH '18
Q/B - sold. |
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rv10flyer
Joined: 25 Aug 2009
Posts: 364
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| Posted: Wed Sep 07, 2011 5:33 am Post subject: Re: Horizontal Stabilizer bolts loose at annual |
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We lose some clamping force with all of that primer. There are many flight critical connectons on this plane that should have drilled heads or shanks for safety wire or cotter pins.
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Wayne G. |
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pitts_pilot(at)bellsouth.
Guest
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| Posted: Wed Sep 07, 2011 7:47 am Post subject: Horizontal Stabilizer bolts loose at annual |
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Good for ya!!! Any idea why they loosened??
Linn
On 9/6/2011 11:59 PM, AirMike wrote:
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AirMike
Joined: 27 Feb 2007
Posts: 514
Location: Nevada
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| Posted: Thu Sep 08, 2011 7:13 am Post subject: Horizontal Stabilizer bolts loose at annual cause suspected |
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I suspect that:
1. Vibration loosened the nuts. Or
2. Vans has you install the bolts - top down with the nuts on the underside.
Thinking about it now, this might be wrong. I obviously torqued the assembly from the top. Not the best way to do it. You do not get an accurate torque value. If I were building again -bolts bottom-up. That way you can torque the nuts precisely.
3. Some combination of inaccurate torque and vibration.
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See you OSH '18
Q/B - sold. |
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Tim Olson
Joined: 25 Jan 2007
Posts: 2872
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| Posted: Thu Sep 08, 2011 7:44 am Post subject: Horizontal Stabilizer bolts loose at annual |
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Big mistake. If you do that, and the nuts loosen, it'll fall
right out. That's why all bolts are IN, DOWN, AFT on their
direction.
Tim Olson - RV-10 N104CD
do not archive
On 9/8/2011 10:13 AM, AirMike wrote:
| Quote: |
I suspect that:
1. Vibration loosened the nuts. Or
2. Vans has you install the bolts - top down with the nuts on the underside.
Thinking about it now, this might be wrong. I obviously torqued the assembly from the top. Not the best way to do it. You do not get an accurate torque value. If I were building again -bolts bottom-up. That way you can torque the nuts precisely.
3. Some combination of inaccurate torque and vibration.
--------
See you OSH '11
Q/B - flying 1 yr+
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=351733#351733
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jdriggs49(at)msn.com
Guest
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| Posted: Thu Sep 08, 2011 7:57 am Post subject: Horizontal Stabilizer bolts loose at annual |
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Soooo,
What is the theory about substituting castle nuts and locking pins? Any good reason not to do so on these critical areas????
| Quote: | Date: Thu, 8 Sep 2011 10:40:25 -0500
From: Tim(at)myrv10.com
To: rv10-list(at)matronics.com
Subject: Re: Re: Horizontal Stabilizer bolts loose at annual
--> RV10-List message posted by: Tim Olson <Tim(at)myrv10.com>
Big mistake. If you do that, and the nuts loosen, it'll fall
right out. That's why all bolts are IN, DOWN, AFT on their
direction.
Tim Olson - RV-10 N104CD
do not archive
On 9/8/2011 10:13 AM, AirMike wrote:
> --> RV10-List message posted by: "AirMike"<Mikeabel(at)Pacbell.net>
>
> I suspect that:
> 1. Vibration loosened the nuts. Or
> 2. Vans has you install the bolts - top down with the nuts on the underside.
> Thinking about it now, this might be wrong. I obviously torqued the assembly from the top. Not the best way to do it. You do not get an accurate torque value. If I were building again -bolts bottom-up. That way you can torque the nuts precisely.
> 3. Some combination of inaccurate torque and vibration.
>
> --------
> See you OSH '11
> Q/B - flying 1 yr+
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=351733#351733
=======================
|
&g================
[quote][b]
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Tim Olson
Joined: 25 Jan 2007
Posts: 2872
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| Posted: Thu Sep 08, 2011 8:13 am Post subject: Horizontal Stabilizer bolts loose at annual |
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I don't see why that would be a bad idea at all.
Tim Olson - RV-10 N104CD
do not archive
On 9/8/2011 10:53 AM, Danny Riggs wrote:
| Quote: | Soooo,
What is the theory about substituting castle nuts and locking pins? Any
good reason not to do so on these critical areas????
> Date: Thu, 8 Sep 2011 10:40:25 -0500
> From: Tim(at)myrv10.com
> To: rv10-list(at)matronics.com
> Subject: Re: Re: Horizontal Stabilizer bolts loose at annual
>
>
>
> Big mistake. If you do that, and the nuts loosen, it'll fall
> right out. That's why all bolts are IN, DOWN, AFT on their
> direction.
>
> Tim Olson - RV-10 N104CD
> do not archive
>
>
> On 9/8/2011 10:13 AM, AirMike wrote:
> >
> >
> > I suspect that:
> > 1. Vibration loosened the nuts. Or
> > 2. Vans has you install the bolts - top down with the nuts on the
underside.
> > Thinking about it now, this might be wrong. I obviously torqued the
assembly from the top. Not the best way to do it. You do not get an
accurate torque value. If I were building again -bolts bottom-up. That
way you can torque the nuts precisely.
> > 3. Some combination of inaccurate torque and vibration.
> >
> > --------
> > See you OSH '11
> > Q/B - flying 1 yr+
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=351733#351733
=======================
&g================
>
|
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jchang10
Joined: 05 Jul 2006
Posts: 227
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| Posted: Thu Sep 08, 2011 8:13 am Post subject: Horizontal Stabilizer bolts loose at annual |
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I just know on those 4 particular AN3 bolts for the HS, access is an issue. It is hard enough with regular lock nuts.
AirMike, i think fewer bounces on landing would help keeps nuts and bolts from loosening. Just kidding! 
On 9/8/2011 8:53 AM, Danny Riggs wrote: [quote] Soooo,
What is the theory about substituting castle nuts and locking pins? Any good reason not to do so on these critical areas????
[b]
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_________________
#40533 RV-10
First flight 10/19/2011
Phase 1 Done 11/26/2011 |
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pitts_pilot(at)bellsouth.
Guest
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| Posted: Thu Sep 08, 2011 8:14 am Post subject: Horizontal Stabilizer bolts loose at annual |
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The problem with castle nuts is most of the time they can't meet the torque spec. Either too high or too low, but seldom right on.
This is the first time I've heard of 'loose' fasteners, and I really appreciate Mike stepping up and letting us know. He does have a point on torquing the head of the bolt rather than the nut. Not the best solution, but should have been close enough. As more -10s go through conditional inspections and the bolts get looked at we'll know if this is an anomaly or not.
Just my two pennies.
Linn
On 9/8/2011 11:53 AM, Danny Riggs wrote: [quote] Soooo,
What is the theory about substituting castle nuts and locking pins? Any good reason not to do so on these critical areas????
> Date: Thu, 8 Sep 2011 10:40:25 -0500
> From: Tim(at)myrv10.com (Tim(at)myrv10.com)
> To: rv10-list(at)matronics.com (rv10-list(at)matronics.com)
> Subject: Re: Re: Horizontal Stabilizer bolts loose at annual
>
> --> RV10-List message posted by: Tim Olson <Tim(at)myrv10.com> (Tim(at)myrv10.com)
>
> Big mistake. If you do that, and the nuts loosen, it'll fall
> right out. That's why all bolts are IN, DOWN, AFT on their
> direction.
>
> Tim Olson - RV-10 N104CD
> do not archive
>
>
> On 9/8/2011 10:13 AM, AirMike wrote:
> > --> RV10-List message posted by: "AirMike"<Mikeabel(at)Pacbell.net> (Mikeabel(at)Pacbell.net)
> >
> > I suspect that:
> > 1. Vibration loosened the nuts. Or
> > 2. Vans has you install the bolts - top down with the nuts on the underside.
> > Thinking about it now, this might be wrong. I obviously torqued the assembly from the top. Not the best way to do it. You do not get an accurate torque value. If I were building again -bolts bottom-up. That way you can torque the nuts precisely.
> > 3. Some combination of inaccurate torque and vibration.
> >
> > --------
> > See you OSH '11
> > Q/B - flying 1 yr+
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=351733#351733
=======================
&g================
>
>
>
[b]
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jeff(at)westcottpress.com
Guest
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| Posted: Thu Sep 08, 2011 8:21 am Post subject: Horizontal Stabilizer bolts loose at annual |
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Hi Tim,
You've got "do not archive" on this one. I think it should be archived
in big bold print.
Jeff Carpenter
40304
On Sep 8, 2011, at 8:40 AM, Tim Olson wrote:
| Quote: |
Big mistake. If you do that, and the nuts loosen, it'll fall
right out. That's why all bolts are IN, DOWN, AFT on their
direction.
Tim Olson - RV-10 N104CD
do not archive
On 9/8/2011 10:13 AM, AirMike wrote:
>
>
> I suspect that:
> 1. Vibration loosened the nuts. Or
> 2. Vans has you install the bolts - top down with the nuts on the
> underside.
> Thinking about it now, this might be wrong. I obviously torqued the
> assembly from the top. Not the best way to do it. You do not get an
> accurate torque value. If I were building again -bolts bottom-up.
> That way you can torque the nuts precisely.
> 3. Some combination of inaccurate torque and vibration.
>
> --------
> See you OSH '11
> Q/B - flying 1 yr+
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=351733#351733
>
|
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philperry9(at)gmail.com
Guest
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| Posted: Thu Sep 08, 2011 8:28 am Post subject: Horizontal Stabilizer bolts loose at annual |
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I was thinking about a hybrid approach. Drilled bolts, locked torque nuts, but a cotter key through the bolt just to keep the nut from being able to back off......
Phil
On Sep 8, 2011, at 11:09 AM, Linn Walters <pitts_pilot(at)bellsouth.net (pitts_pilot(at)bellsouth.net)> wrote:
[quote] The problem with castle nuts is most of the time they can't meet the torque spec. Either too high or too low, but seldom right on.
This is the first time I've heard of 'loose' fasteners, and I really appreciate Mike stepping up and letting us know. He does have a point on torquing the head of the bolt rather than the nut. Not the best solution, but should have been close enough. As more -10s go through conditional inspections and the bolts get looked at we'll know if this is an anomaly or not.
Just my two pennies.
Linn
On 9/8/2011 11:53 AM, Danny Riggs wrote: | Quote: | Soooo,
What is the theory about substituting castle nuts and locking pins? Any good reason not to do so on these critical areas????
> Date: Thu, 8 Sep 2011 10:40:25 -0500
> From: [url=mailto:Tim(at)myrv10.com]Tim(at)myrv10.com (Tim(at)myrv10.com)[/url]
> To: [url=mailto:rv10-list(at)matronics.com]rv10-list(at)matronics.com (rv10-list(at)matronics.com)[/url]
> Subject: Re: Re: Horizontal Stabilizer bolts loose at annual
>
> --> RV10-List message posted by: Tim Olson <[url=mailto:Tim(at)myrv10.com]Tim(at)myrv10.com (Tim(at)myrv10.com)>[/url]
>
> Big mistake. If you do that, and the nuts loosen, it'll fall
> right out. That's why all bolts are IN, DOWN, AFT on their
> direction.
>
> Tim Olson - RV-10 N104CD
> do not archive
>
>
> On 9/8/2011 10:13 AM, AirMike wrote:
> > --> RV10-List message posted by: "AirMike"<[url=mailto:Mikeabel(at)Pacbell.net]Mikeabel(at)Pacbell.net (Mikeabel(at)Pacbell.net)>[/url]
> >
> > I suspect that:
> > 1. Vibration loosened the nuts. Or
> > 2. Vans has you install the bolts - top down with the nuts on the underside.
> > Thinking about it now, this might be wrong. I obviously torqued the assembly from the top. Not the best way to do it. You do not get an accurate torque value. If I were building again -bolts bottom-up. That way you can torque the nuts precisely.
> > 3. Some combination of inaccurate torque and vibration.
> >
> > --------
> > See you OSH '11
> > Q/B - flying 1 yr+
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=351733#351733
=======================
&g================
>
>
>
|
[b]
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dlm34077(at)q.com
Guest
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| Posted: Thu Sep 08, 2011 9:03 am Post subject: Horizontal Stabilizer bolts loose at annual |
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Install HiLocs
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Phil Perry
Sent: Thursday, September 08, 2011 9:24 AM
To: rv10-list(at)matronics.com
Subject: Re: Re: Horizontal Stabilizer bolts loose at annual
I was thinking about a hybrid approach. Drilled bolts, locked torque nuts, but a cotter key through the bolt just to keep the nut from being able to back off......
Phil
On Sep 8, 2011, at 11:09 AM, Linn Walters <pitts_pilot(at)bellsouth.net (pitts_pilot(at)bellsouth.net)> wrote:
[quote]
The problem with castle nuts is most of the time they can't meet the torque spec. Either too high or too low, but seldom right on.
This is the first time I've heard of 'loose' fasteners, and I really appreciate Mike stepping up and letting us know. He does have a point on torquing the head of the bolt rather than the nut. Not the best solution, but should have been close enough. As more -10s go through conditional inspections and the bolts get looked at we'll know if this is an anomaly or not.
Just my two pennies.
Linn
On 9/8/2011 11:53 AM, Danny Riggs wrote:
Soooo,
What is the theory about substituting castle nuts and locking pins? Any good reason not to do so on these critical areas????
> To: (rv10-list(at)matronics.com)rv10-list(at)matronics.com (rv10-list(at)matronics.com)
> Subject: Re: Re: Horizontal Stabilizer bolts loose at annual
>
> --> RV10-List message posted by: Tim Olson < (Tim(at)myrv10.com)Tim(at)myrv10.com (Tim(at)myrv10.com)>
>
> Big mistake. If you do that, and the nuts loosen, it'll fall
> right out. That's why all bolts are IN, DOWN, AFT on their
> direction.
>
> Tim Olson - RV-10 N104CD
> do not archive
>
>
> On 9/8/2011 10:13 AM, AirMike wrote:
> > --> RV10-List message posted by: "AirMike"< (Mikeabel(at)Pacbell.net)Mikeabel(at)Pacbell.net (Mikeabel(at)Pacbell.net)>
> >
> > I suspect that:
> > 1. Vibration loosened the nuts. Or
> > 2. Vans has you install the bolts - top down with the nuts on the underside.
> > Thinking about it now, this might be wrong. I obviously torqued the assembly from the top. Not the best way to do it. You do not get an accurate torque value. If I were building again -bolts bottom-up. That way you can torque the nuts precisely.
> > 3. Some combination of inaccurate torque and vibration.
> >
> > --------
> > See you OSH '11
> > Q/B - flying 1 yr+
> >
> >
> >
> >
> > Read this topic online here:
> >
> > [/url][url=http://forums.matronics.com/viewtopic.php?p=351733#351733]http://forums.matronics.com/viewtopic.php?p=351733#351733
=======================
&g================
>
>
>
[b]
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bruce1hwjohnson(at)yahoo.
Guest
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| Posted: Thu Sep 08, 2011 9:13 am Post subject: Horizontal Stabilizer bolts loose at annual |
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Speaking of annuals, dose anybody have a list generated for a step by step procedure? And of course mine is due as to why I am inquiring.
From: Linn Walters <pitts_pilot(at)bellsouth.net>
To: rv10-list(at)matronics.com
Sent: Thursday, September 8, 2011 9:09 AM
Subject: Re: RV10-List: Re: Horizontal Stabilizer bolts loose at annual
The problem with castle nuts is most of the time they can't meet the torque spec. Either too high or too low, but seldom right on.
This is the first time I've heard of 'loose' fasteners, and I really appreciate Mike stepping up and letting us know. He does have a point on torquing the head of the bolt rather than the nut. Not the best solution, but should have been close enough. As more -10s go through conditional inspections and the bolts get looked at we'll know if this is an anomaly or not.
Just my two pennies.
Linn
On 9/8/2011 11:53 AM, Danny Riggs wrote: [quote] Soooo,
What is the theory about substituting castle nuts and locking pins? Any good reason not to do so on these critical areas????
> Date: Thu, 8 Sep 2011 10:40:25 -0500
| Quote: | From: Tim(at)myrv10.com (Tim(at)myrv10.com)
To: rv10-list(at)matronics.com (rv10-list(at)matronics.com)
Subject: Re: RV10-List: Re: Horizontal Stabilizer bolts loose at annual
--> RV10-List message posted by: Tim Olson <Tim(at)myrv10.com> (Tim(at)myrv10.com)
Big mistake. If you do that, and the nuts loosen, it'll fall
right out. That's why all bolts are IN, DOWN, AFT on their
direction.
Tim Olson - RV-10 N104CD
do not archive
On 9/8/2011 10:13 AM, AirMike wrote:
> --> RV10-List message posted by: "AirMike"<Mikeabel(at)Pacbell.net> (Mikeabel(at)Pacbell.net)
>
> I suspect that:
> 1. Vibration loosened the nuts. Or
> 2. Vans has you install the bolts - top down with the nuts on the underside.
> Thinking about it now, this might be wrong. I obviously torqued the assembly from the top. Not the best way to do it. You do not get an accurate torque value. If I were building again -bolts bottom-up. That way you can torque the nuts precisely.
> 3. Some combination of inaccurate torque and vibration.
>
> --------
> See you OSH '11
> Q/B - flying 1 yr+
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=351733#351733
=======================
|
&g================
get=_blank rel=nofollow>http://www.matronics.com/Navigator?RV10-List
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blank rel=nofollow>http://www.matronics.com/contribution
[b]
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pietflyr(at)bellsouth.net
Guest
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| Posted: Thu Sep 08, 2011 11:21 am Post subject: Horizontal Stabilizer bolts loose at annual |
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One thing Van’s does that I just don’t agree with is their use of locknuts on rotating assemblies (like aileron hinges). AC 43.13 most definitely requires castle nuts and cotter pins in such locations. Locknuts can and will loosen if rotated enough.
Jack Philliips
#40610
Raleigh, NC
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Danny Riggs
Sent: Thursday, September 08, 2011 11:53 AM
To: rv10-list(at)matronics.com
Subject: RE: Re: Horizontal Stabilizer bolts loose at annual
Soooo,
What is the theory about substituting castle nuts and locking pins? Any good reason not to do so on these critical areas????
> To: rv10-list(at)matronics.com
> Subject: Re: Re: Horizontal Stabilizer bolts loose at annual
>
> --> RV10-List message posted by: Tim Olson <Tim(at)myrv10.com>
>
> Big mistake. If you do that, and the nuts loosen, it'll fall
> right out. That's why all bolts are IN, DOWN, AFT on their
> direction.
>
> Tim Olson - RV-10 N104CD
> do not archive
>
>
> On 9/8/2011 10:13 AM, AirMike wrote:
> > --> RV10-List message posted by: "AirMike"<Mikeabel(at)Pacbell.net>
> >
> > I suspect that:
> > 1. Vibration loosened the nuts. Or
> > 2. Vans has you install the bolts - top down with the nuts on the underside.
> > Thinking about it now, this might be wrong. I obviously torqued the assembly from the top. Not the best way to do it. You do not get an accurate torque value. If I were building again -bolts bottom-up. That way you can torque the nuts precisely.
> > 3. Some combination of inaccurate torque and vibration.
> >
> > --------
> > See you OSH '11
> > Q/B - flying 1 yr+
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=351733#351733
=======================
&g================
>
>
>
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carl.froehlich(at)verizon
Guest
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| Posted: Thu Sep 08, 2011 11:53 am Post subject: Horizontal Stabilizer bolts loose at annual |
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The bolt and nut captures the hinge bearing. The hinge bearing rotates. There is no relative motion between the bolt/nut and the bearing ball.
Using a castle nut would yield the bolt becoming the bearing as you would most likely not have it tight enough to capture the bearing ball. Not recommended.
Carl
Sent from my phone. Please read pass the typos.
-----Original message-----
[quote]From: Jack Phillips <pietflyr(at)bellsouth.net>
To: rv10-list(at)matronics.com
Sent: Thu, Sep 8, 2011 19:16:02 GMT+00:00
Subject: RE: RV10-List: Re: Horizontal Stabilizer bolts loose at annual
v\:* {behavior:url(#default#VML);} o\:* {behavior:url(#default#VML);} w\:* {behavior:url(#default#VML);} .shape {behavior:url(#default#VML);} <![endif]--> st1\:*{behavior:url(#default#ieooui) } <![endif]-->
One thing Van’s does that I just don’t agree with is their use of locknuts on rotating assemblies (like aileron hinges). AC 43.13 most definitely requires castle nuts and cotter pins in such locations. Locknuts can and will loosen if rotated enough.
Jack Philliips
#40610
Raleigh, NC
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Danny Riggs
Sent: Thursday, September 08, 2011 11:53 AM
To: rv10-list(at)matronics.com
Subject: RE: RV10-List: Re: Horizontal Stabilizer bolts loose at annual
Soooo,
What is the theory about substituting castle nuts and locking pins? Any good reason not to do so on these critical areas????
> To: rv10-list(at)matronics.com
> Subject: Re: RV10-List: Re: Horizontal Stabilizer bolts loose at annual
>
> --> RV10-List message posted by: Tim Olson <Tim(at)myrv10.com>
>
> Big mistake. If you do that, and the nuts loosen, it'll fall
> right out. That's why all bolts are IN, DOWN, AFT on their
> direction.
>
> Tim Olson - RV-10 N104CD
> do not archive
>
>
> On 9/8/2011 10:13 AM, AirMike wrote:
> > --> RV10-List message posted by: "AirMike"<Mikeabel(at)Pacbell.net>
> >
> > I suspect that:
> > 1. Vibration loosened the nuts. Or
> > 2. Vans has you install the bolts - top down with the nuts on the underside.
> > Thinking about it now, this might be wrong. I obviously torqued the assembly from the top. Not the best way to do it. You do not get an accurate torque value. If I were building again -bolts bottom-up. That way you can torque the nuts precisely.
> > 3. Some combination of inaccurate torque and vibration.
> >
> > --------
> > See you OSH '11
> > Q/B - flying 1 yr+
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=351733#351733
=======================
&g================
>
>
>
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Kelly McMullen
Joined: 16 Apr 2008
Posts: 1188
Location: Sun Lakes AZ
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| Posted: Thu Sep 08, 2011 3:48 pm Post subject: Horizontal Stabilizer bolts loose at annual |
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|
The latest product is castle nuts that are also self locking.
Available from usual sources. On the road, so don't have the MS number
handy. They are specifically for use on all control hinges and other
places like push pull tube bellcranks.
On Thu, Sep 8, 2011 at 12:16 PM, Jack Phillips <pietflyr(at)bellsouth.net> wrote:
| Quote: | One thing Van’s does that I just don’t agree with is their use of locknuts
on rotating assemblies (like aileron hinges). AC 43.13 most definitely
requires castle nuts and cotter pins in such locations. Locknuts can and
will loosen if rotated enough.
Jack Philliips
#40610
Raleigh, NC
________________________________
From: owner-rv10-list-server(at)matronics.com
[mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Danny Riggs
Sent: Thursday, September 08, 2011 11:53 AM
To: rv10-list(at)matronics.com
Subject: RE: Re: Horizontal Stabilizer bolts loose at annual
Soooo,
What is the theory about substituting castle nuts and locking pins? Any good
reason not to do so on these critical areas????
> Date: Thu, 8 Sep 2011 10:40:25 -0500
> From: Tim(at)myrv10.com
> To: rv10-list(at)matronics.com
> Subject: Re: Re: Horizontal Stabilizer bolts loose at annual
>
>
>
> Big mistake. If you do that, and the nuts loosen, it'll fall
> right out. That's why all bolts are IN, DOWN, AFT on their
> direction.
>
> Tim Olson - RV-10 N104CD
> do not archive
> On 9/8/2011 10:13 AM, AirMike wrote:
> >
> >
> > I suspect that:
> > 1. Vibration loosened the nuts. Or
> > 2. Vans has you install the bolts - top down with the nuts on the
> > underside.
> > Thinking about it now, this might be wrong. I obviously torqued the
> > assembly from the top. Not the best way to do it. You do not get an accurate
> > torque value. If I were building again -bolts bottom-up. That way you can
> > torque the nuts precisely.
> > 3. Some combination of inaccurate torque and vibration.
> >
> > --------
> > See you OSH '11
> > Q/B - flying 1 yr+
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p=351733#351733
=======================
&g================
>
http://www.matronics.com/Navigator?RV10-List
http://forums.matronics.com
http://www.matronics.com/contribution
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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor
KCHD |
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jcumins(at)jcis.net
Guest
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| Posted: Thu Sep 08, 2011 4:05 pm Post subject: Horizontal Stabilizer bolts loose at annual |
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Man that’s a great idea. I will have to do that. Just because the castle
nut is used it will no cause the bolt to be the pivot point as long as the
nut is properly torched and confirmed tight.
John Cumins
President
707-425-7100
707-425-7576 Fax
--
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kearney
Joined: 20 Sep 2008
Posts: 563
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| Posted: Thu Sep 08, 2011 4:30 pm Post subject: Horizontal Stabilizer bolts loose at annual |
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|
Hi Kelley
I have been reading this thread with interest. On the recommendation of an AME (Cdn A&P) I have replaced a few of the critical nylocs with self locking castles.
Cheers
Les
Sent from my iPhone
On 2011-09-08, at 4:45 PM, Kelly McMullen <apilot2(at)gmail.com> wrote:
| Quote: |
The latest product is castle nuts that are also self locking.
Available from usual sources. On the road, so don't have the MS number
handy. They are specifically for use on all control hinges and other
places like push pull tube bellcranks.
On Thu, Sep 8, 2011 at 12:16 PM, Jack Phillips <pietflyr(at)bellsouth.net> wrote:
> One thing Van’s does that I just don’t agree with is their use of locknuts
> on rotating assemblies (like aileron hinges). AC 43.13 most definitely
> requires castle nuts and cotter pins in such locations. Locknuts can and
> will loosen if rotated enough.
>
>
>
> Jack Philliips
>
> #40610
>
> Raleigh, NC
>
>
>
> ________________________________
>
> From: owner-rv10-list-server(at)matronics.com
> [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Danny Riggs
> Sent: Thursday, September 08, 2011 11:53 AM
>
> To: rv10-list(at)matronics.com
> Subject: RE: Re: Horizontal Stabilizer bolts loose at annual
>
>
>
> Soooo,
> What is the theory about substituting castle nuts and locking pins? Any good
> reason not to do so on these critical areas????
>
>> Date: Thu, 8 Sep 2011 10:40:25 -0500
>> From: Tim(at)myrv10.com
>> To: rv10-list(at)matronics.com
>> Subject: Re: Re: Horizontal Stabilizer bolts loose at annual
>>
>>
>>
>> Big mistake. If you do that, and the nuts loosen, it'll fall
>> right out. That's why all bolts are IN, DOWN, AFT on their
>> direction.
>>
>> Tim Olson - RV-10 N104CD
>> do not archive
>>
>>
>> On 9/8/2011 10:13 AM, AirMike wrote:
>>>
>>>
>>> I suspect that:
>>> 1. Vibration loosened the nuts. Or
>>> 2. Vans has you install the bolts - top down with the nuts on the
>>> underside.
>>> Thinking about it now, this might be wrong. I obviously torqued the
>>> assembly from the top. Not the best way to do it. You do not get an accurate
>>> torque value. If I were building again -bolts bottom-up. That way you can
>>> torque the nuts precisely.
>>> 3. Some combination of inaccurate torque and vibration.
>>>
>>> --------
>>> See you OSH '11
>>> Q/B - flying 1 yr+
>>>
>>>
>>>
>>>
>>> Read this topic online here:
>>>
>>> http://forums.matronics.com/viewtopic.php?p=351733#351733
> =======================
> &g================
>>
>>
>>
>
>
>
>
>
> http://www.matronics.com/Navigator?RV10-List
>
> http://forums.matronics.com
>
> http://www.matronics.com/contribution
>
>
>
>
>
|
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