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hotwheels
Joined: 01 Jun 2007
Posts: 240
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 Posted: Sat May 30, 2009 1:10 pm Post subject: wiggly step syndrome |
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I recently received a couple of beautifully machined bushings to preempt the wiggly step syndrome. A couple of observations:
* One of my steps wiggled ever so slightly. My theory why this is so is that the step holes weren't drilled perfectly perpendicular. Thus the AN3 bolt can't grip quite enough... and the step would exhibit more wiggle over time.
* Using machined bushings sounds good, but they may not fit right if holes are already drilled through the WD-1007 step and WD-1008 mounting bracket... unless your holes are just about perfect.
* If anyone hasn't yet drilled their step and wants a pair of "new" bushings, mine can be had for $23 including shipping ($33 otherwise). Contact me offline if interested.
* Replacing the AN-3 bolts with AN-4 bolts made a huge difference. Once the hardware was changed out there was no more step movement.
* Step access panels rock. Step inspection / tightening / replacement would be very difficult without having panels installed and I don't know how you'd do it otherwise. I used a couple of extra Vans wing type access panel kits for mine.
* Gottcha - Note that the bolt on page 30-4 installed with the head on top. Removing that bolt bolt after the fact requires lots of upwards clearance and it just so happens that there's a riveted on side panel in the way. Even with access panels removing the bolt is difficult. I ended up cutting mine off and installing the new -4 hardware with the bolt head on the bottom.
Now it's back to fiberglass work!
Regards,
Jay
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johngoodman
Joined: 18 Sep 2006
Posts: 530
Location: GA
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| Posted: Sun May 31, 2009 3:34 am Post subject: Re: wiggly step syndrome |
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My steps had a slight wiggle, but I replaced the AN3 bolt with an AN173 close tolerance bolt and it's rock solid. Get 'em at Aircraft Spruce.
John
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