 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
steve2(at)sover.net
Guest
|
 Posted: Tue Apr 25, 2006 4:40 am Post subject: Main Gear Clevis Failure |
 |
|
We had an interesting failure the other day I thought I might pass along to
the group.
The main gear retract cylinders are attached to the the gear by two clevises
(clevi?) each. They look a like a fork. The pieces look robust enough (and
obviously well suited to the task since they've lasted 45 years.) The fork
portion of the clevis is attached to a tube which is secured into the gear
by a bolt and barrel nut. The 'tube' is not a solid bar.
One clevis broke the other day while putting the gear down, leaving a
retract cylinder just hanging. It appears that the failure was a long time
coming as there was evidence of old damage to the broken piece. (Aircraft
had to be slowed to allow the one cylinder do the job.)
We all scratched our heads wondering if anything any of us ever did
contributed to the failure. The old-timer here even thought back to the time
that the gear didn't rotate upon retraction. Maybe its overkill but I'm
always careful to try to lower the gear when I can grab some smooth air.
It might not be a bad idea to make pulling these clevis every so often part
of your inspection. This summer after our season ends we were going to take
the gear apart, but this clevis beat us to it. They are pretty easy to drop
and a little wooden wedge jamming the barrel nut in place will save some
grief reinstalling.
Our new part arrived with different geometry and a different hole size for
the bolt securing the cylinder end to the clevis. We're a 500A converted to
a B in 64(?) so this might have something to do with it, but be aware it
might not be plug-and-play if you swap any out.
Steve
| | - The Matronics Commander-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Commander-List |
|
|
|
| Back to top |
|
 |
YOURTCFG(at)aol.com
Guest
|
| Posted: Tue Apr 25, 2006 8:12 am Post subject: Main Gear Clevis Failure |
|
|
In a message dated 4/25/2006 5:41:16 A.M. Pacific Standard Time,
steve2(at)sover.net writes:
It might not be a bad idea to make pulling these clevis every so often part
of your inspection.
This is a fairly common failure. It may be caused by the cylinder not being
properly rigged. Carefully follow the Commander service instructions for
rigging the gear. The TCFG recommends that these forks be replace at about
1000hr, more frequently if the airplane is used on short flights. Some
operators remove and magniflux these part periodically, but replacement makes good
sense. jb
| | - The Matronics Commander-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Commander-List |
|
|
|
| Back to top |
|
|
floydgm(at)hotmail.com
Guest
|
| Posted: Tue Apr 25, 2006 8:21 am Post subject: Main Gear Clevis Failure |
|
|
I have seen more than one failure of the clevis. If the mount holes are a
different size you probably have the clevis for the main cylinder. You also
want to look at the others and maybe get them magnafluxed.
Mike
Commander NW
| | - The Matronics Commander-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Commander-List |
|
|
|
| Back to top |
|
|
moe(at)rosspistons.com
Guest
|
| Posted: Wed Apr 26, 2006 5:51 am Post subject: Main Gear Clevis Failure |
|
|
Gents,
Think I missed something....what clevis is breaking?
Moe
N680RR
680F(p)
---
| | - The Matronics Commander-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Commander-List |
|
|
|
| Back to top |
|
|
floydgm(at)hotmail.com
Guest
|
| Posted: Wed Apr 26, 2006 6:16 am Post subject: Main Gear Clevis Failure |
|
|
The clevis's that the main gear retract cylinders attach to on the top
barrel of the main gear under the trunnion pins. The rod ends on the
cylinder rams attach to them.
Mike
Commander NW
| | - The Matronics Commander-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Commander-List |
|
|
|
| Back to top |
|
|
steve2(at)sover.net
Guest
|
| Posted: Wed Apr 26, 2006 12:33 pm Post subject: Main Gear Clevis Failure |
|
|
Thanks Mike, we're taking the gear out of the aircraft and rebuilding it
this summer.
Steve
| Quote: | >
>
> I have seen more than one failure of the clevis. If the mount holes are a
> different size you probably have the clevis for the main cylinder. You
also
> want to look at the others and maybe get them magnafluxed.
>
> Mike
> Commander NW
>
|
| | - The Matronics Commander-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Commander-List |
|
|
|
| Back to top |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
