Today's Message Index:
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1. 09:34 PM - Squeaking nose gear (SteveR)
2. 10:04 PM - Re: Squeaking nose gear (teamgrumman@AOL.COM)
3. 10:16 PM - strange compression test. (teamgrumman@aol.com)
Message 1
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| Subject: | Squeaking nose gear |
The nose gear in an AA5 Traveler I've been flying lately started squeaking after
a rain shower (the plane is kept outside currently). The squeak is coming from
the nose gear torque tube area (very near the firewall). I think maybe it
just needs to be lubricated as I read about this elsewhere. Would anyone agree
with that? I'm new to Grummans so I'm not sure if the squeaky nose gear is
common or not. Bouncing the nose up and down slightly makes it squeak fairly
loud.
What is the proper procedure and lubricant to use on the torque tube/nose gear
strut junction, assuming that is where the squeak is coming from? Does the nose
gear strut have to be removed from the torque tube in order to lubricate it?
Or if I'm going in completely the wrong direction, I'd be glad to hear about that
too. Thanks for any help.
Steve
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=239660#239660
Message 2
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| Subject: | Re: Squeaking nose gear |
Hi Steve,
If you had the shocks on the nose gear, I'd say look there first.
You'll need to remove the cowling and locate where the squeak is coming
from. If it's in the nose gear torque tube attach, remove the boot
around the strut and check the attachment bolts. I've seen a number of
planes with AN bolts installed when they should be NAS. Also, if the
bolts have been crowded out, they'll need to be reamed a half size over
and special bolts installed.
Also, I'd suggest you remove the seats and crawl in under the panel and
have someone move the nose up and down and check for squeaking in the
torque tube itself.
-----Original Message-----
From: SteveR <steve@wotelectronics.com>
Sent: Thu, 16 Apr 2009 9:34 pm
Subject: TeamGrumman-List: Squeaking nose gear
<steve@wotelectronics.com>
The nose gear in an AA5 Traveler I've been flying lately started
squeaking after
a rain shower (the plane is kept outside currently). The squeak is
coming from
the nose gear torque tube area (very near the firewall). I think maybe
it just
needs to be lubricated as I read about this elsewhere. Would anyone
agree with
that? I'm new to Grummans so I'm not sure if the squeaky nose gear is
common or
not. Bouncing the nose up and down slightly makes it squeak fairly
loud.
What is the proper procedure and lubricant to use on the torque
tube/nose gear
strut junction, assuming that is where the squeak is coming from? Does
the nose
gear strut have to be removed from the torque tube in order to
lubricate it?
Or if I'm going in completely the wrong direction, I'd be glad to hear
about
that too. Thanks for any help.
Steve
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=239660#239660
Message 3
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| Subject: | strange compression test. |
I installed a new Lycoming O360 (roller cam) into a Tiger a few months
ago. The break-in was normal with one exception.
The #2 cylinder compression was strange.
Compression was checked at 10 hrs and 25 hours since new.
Both times, the compression on #2 fell off dramatically at 20 to 15
BTDC. Compression came back up slightly to 60/80 at TDC. On the other
side, ATDC, compression fell off slightly and then went back up before
going back down.
At 25 hours, the cylinder was pulled, sent to Lycon for inspection.
Valves/seats were recut, rings were honed, cylinder was rehoned. The
plane was flown again for 10 hrs and the compression tested. The
compression fall-off wasn't as bad, but, it was still there. Plane was
flown for another 15 hours. At 50 hours, I removed the cylinder and
replaced it with another new cylinder.
The owner has about 5 hours on it and I'll be checking it again.
Note: when the cylinder was pulled, the piston was removed to the
point where I could remove the wrist pin. The top of the piston was
scuffed in a "V" shape from about 1 inch below the rings to the ring
grooves. At the grooves, the scuffing was about 1 inch wide. I did
not remove the piston and look inside. I sent the cylinder to Lycon
today.
Has anyone ever heard of this before?
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