Peter,
You bring up a good point and I had wondered about this.
The Europa does use a castle nut at the base of the stick at
a point where a tight fit would prevent the movement of the
stick. All the areas where a self-locking nuts are used is on
a rod end bearing where tightening the nut does affect the friction
of the parts.
I looked in AC 43-13, page 7-11, para 7-64d. It states that
self-locking nuts may be used in this situation.
I will have to call my counselor to discuss this.
Thanks to everyone who responded.
John Eckel, A230
----- Original Message -----
From: "Peter Zutrauen" <peterz@zutrasoft.com>
Subject: RE: Europa-List: cotter pins
>
> As an aside regarding safety wires etc. I remember from my preflights
> that the certified Katana also uses stiffnuts on some of the rotating
> parts, specifically the aileron bellcrank in the wing which is inspected
> through a clear plexi cover under the wing. In that case I noticed that
> they used a dab of bright goo (lockite maybe?) on the exposed threads &
> nut to be able to visually identify if the stiffnut had backed off.
>
> If a certified ship like the Katana uses the same stiff nut technology,
> I wonder how the latest 'Aircraft Maintenance Manual' can not list this
> method as acceptable. (what document is this manual? AC 4313?)
>
> Cheers,
> Pete
> A239
>
> -----Original Message-----
> From: rlborger [mailto:rlborger@mac.com]
> To: europa-list@matronics.com
> Subject: Re: Europa-List: cotter pins
>
>
> John,
>
> I had my TC in for my first inspection just before I bonded my cockpit
> module in. His comments about kit quality were very similar to those
> made by your counselor. My counselor also said that all the screw-in
> or screw-on parts should be safety wired or cotter pinned. I showed
> him the stiff-nuts provided by Europa and demonstrated how they work.
> He said; "Well, it's their kit and it seems to be working for them. Go
> ahead and build it the way they say to." He then signed off on the
> work.
>
> I hope you can work out a similar agreement with your counselor. I
> sure wouldn't have wanted to have to go back and replace every nut and
> bolt in my kit.
>
> Good building,
> Bob Borger
> Europa Kit #A221 N914XL, XS Mono, 914, Airmaster C/S
> (60%) tail kit done, wings closed, cockpit module installed, pitch
> system in, landing gear frame in, rudder system in, working chapters 23
> Fuselage Top, 24 Instrument Panel, 25 Electrical & 29 Main Gear.
> 3705 Lynchburg Dr.
> Corinth, TX 76208
> Home: 940-497-2123
> Cel: 817-992-1117
>
> > Hello,
> > My tech counselor looked at my progress today and as usual
> > commented on what a fine kit the Europa is.
> > However, he does have an issue with not using castle nuts and cotter
> pins
> > on bolts that are holding rotating parts together. The aircraft
> maintenance
> > manual does say that cotter keys should be used on all rotating
> parts. This includes
> > all the controls in the cockpit module, the wings, flap pivot points
> and others
> > I haven't found yet. So, I am in the process of getting new bolts,
> nuts and cotter
> > pins.
> > Has anyone else run into this problem?
> > The Europa is not the only kit with this problem, he was the TC on a
> Kitfox
> > and it had the same lack of proper hardware.
> > I am sure there are others.
> >
> > John Eckel, A230
>
>
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> ==
> ==
> ==
>
>
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