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larry(at)macsmachine.com
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 Posted: Wed Aug 29, 2007 6:14 am Post subject: HDS nose gear bottom attachment to fuselage - sheared rivet |
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Hi Peter,
The segment shown with the rivet head broken off should have had a
bolt. That's what the latest revision
of the plans require. It is crowded with the other bolt heads sticking
up, but it can be done.
I'm surprised to see that a rivet held up so long in that area. See link,
http://www.macsmachine.com/images/gear/full/stratstops.gif
Larry McFarland 601HDS at www.macsmachine.com
Peter Chapman wrote:
| Quote: |
Just to mention a maintenance issue I recently found.
This was on a 601 HDS with 450 engine hours (vs. fewer flight hours).
The ramps on which the nose gear steering rod rests, appear to attach
to the U-channel that runs up the firewall, with a bolt and (I think)
an A5 rivet on each side.
On both sides, the A5 was found at an annual inspection to be sheared
off.
The ca. 1995 kit was from an era when everything was steel on steel,
with no nylon in the gear slide assemblies. However, this aircraft was
built with a nylon block below the strap that is bolted under the
fuselage, which holds the nose gear tube. A couple of bolts connecting
the strap to the fuselage appear slightly loose, something I'm now
looking into. They're in the first row aft of the firewall, as if the
strap were getting bent up and down, more likely once those rivets
sheared. (Even in the small version of the photo attached, one bolt
head appears to not be flush with the strap.)
It might be possible to replace the rivets with bolts, but there is
limited space on the inside of the U-channel because of other bolts
coming up vertically in that area.
Clearly there's some stress on the area. The aircraft flies mainly off
pavement but from time to time uses a grass runway, and we know how
stiff the bungee gear system is.
Peter Chapman
Toronto, ON 601 HDS / 912 / C-GZDC
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Jeyoung65(at)aol.com
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| Posted: Wed Aug 29, 2007 8:02 am Post subject: HDS nose gear bottom attachment to fuselage - sheared rivet |
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When was the drawing 6-F-10 rev. Mine is dated 09-03 and has only one bolt on each side at this location. These bolts secure the (one for each 6-F-10-1) Nose Gear Stops to the 6-F-9-4 Center Firewall Stiffener. How important is adding the second bolt? If the second bolt is required then I will have to replace the Center Firewall Stiffener or just add the new bolts with less then desired spacing. Jerry of GA
AOL.com.
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