Today's Message Index:
----------------------
1. 02:31 AM - CJ gear comes down nose first, then mains (JL2A)
2. 08:27 AM - Re: . Low Pass Engine Sputter (HawkerPilot2015)
3. 09:42 AM - Re: CJ gear comes down nose first, then mains (A. Dennis Savarese)
4. 10:27 AM - Re: CJ gear comes down nose first, then mains (Walter Lannon)
5. 07:09 PM - Re: CJ gear comes down nose first, then mains (doug sapp)
Message 1
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| Subject: | CJ gear comes down nose first, then mains |
Hi all, looking for a plausible explanation:
We recently replaced MLG uplocks, MLG uplock actuators, lines, shuttle valve (on
uplocks), hoses and solid air lines of the MLG. Also one new actuator, the other
two were new in the last few years. The NLG uplock actuator is off a 2003
built CJ. The shuttle valves on NLG and MLG actuators are old but seemingly serviceable.
After conducting flight with gear handle in UP position, selecting DOWN has the
nose gear releasing first, followed by the mains (more or less together). I'd
have to double check but I think the nose gear is locked before the others start
- I think the book specifies 2 second delay as ok with this sequence, this
would be close but I'd love to know why.
Strange behaviour. This aircraft has always been like this, I guess all this new
stuff eliminates a few things, but any ideas on what it could be?
** If flight is conducted with gear handle NEUTRAL, then for gear extension it
is selected UP 1-2-3 then DOWN, they all come out perfectly together. This is
not how we normally operate, but it may have some bearing on it?***
Our next move is to use Doug's shuttle valve referb kits on the older shuttle valves.
Any other thoughts?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=472733#472733
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| Subject: | Re: . Low Pass Engine Sputter |
While there is not a requirement for configuration or speed (
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=472745#472745
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| Subject: | Re: CJ gear comes down nose first, then mains |
Are the restrictors in the pneumatic lines going to the main and nose gear
actuators?=C2- On the CJ, they're suppose to be on both the up and down s
ide of the actuator.Dennis
From: JL2A <info@flyingwarbirds.com.au>
To: yak-list@matronics.com
Sent: Sunday, September 10, 2017 5:32 AM
Subject: Yak-List: CJ gear comes down nose first, then mains
Hi all, looking for a plausible explanation:
We recently replaced MLG uplocks, MLG uplock actuators, lines, shuttle valv
e (on uplocks), hoses and solid air lines of the MLG. Also one new actuator
, the other two were new in the last few years. The NLG uplock actuator is
off a 2003 built CJ. The shuttle valves on NLG and MLG actuators are old bu
t seemingly serviceable.
After conducting flight with gear handle in UP position, selecting DOWN has
the nose gear releasing first, followed by the mains (more or less togethe
r). I'd have to double check but I think the nose gear is locked before the
others start - I think the book specifies 2 second delay as ok with this s
equence, this would be close but I'd love to know why.
Strange behaviour. This aircraft has always been like this, I guess all thi
s new stuff eliminates a few things, but any ideas on what it could be?
** If flight is conducted with gear handle NEUTRAL, then for gear extension
it is selected UP 1-2-3 then DOWN, they all come out perfectly together. T
his is not how we normally operate, but it may have some bearing on it?***
Our next move is to use Doug's shuttle valve referb kits on the older shutt
le valves. Any other thoughts?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=472733#472733
S -
WIKI -
-
=C2- =C2- =C2- =C2- =C2- -Matt Dralle, List Admin.
Message 4
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| Subject: | Re: CJ gear comes down nose first, then mains |
Check for presence and size of restrictors ref. pg. 105/106 of Tech. Specs.
Walt
-----Original Message-----
From: JL2A
Sent: Sunday, September 10, 2017 2:31 AM
Subject: Yak-List: CJ gear comes down nose first, then mains
Hi all, looking for a plausible explanation:
We recently replaced MLG uplocks, MLG uplock actuators, lines, shuttle valve
(on uplocks), hoses and solid air lines of the MLG. Also one new actuator,
the other two were new in the last few years. The NLG uplock actuator is off
a 2003 built CJ. The shuttle valves on NLG and MLG actuators are old but
seemingly serviceable.
After conducting flight with gear handle in UP position, selecting DOWN has
the nose gear releasing first, followed by the mains (more or less
together). I'd have to double check but I think the nose gear is locked
before the others start - I think the book specifies 2 second delay as ok
with this sequence, this would be close but I'd love to know why.
Strange behaviour. This aircraft has always been like this, I guess all this
new stuff eliminates a few things, but any ideas on what it could be?
** If flight is conducted with gear handle NEUTRAL, then for gear extension
it is selected UP 1-2-3 then DOWN, they all come out perfectly together.
This is not how we normally operate, but it may have some bearing on it?***
Our next move is to use Doug's shuttle valve referb kits on the older
shuttle valves. Any other thoughts?
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=472733#472733
---
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Message 5
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| Subject: | Re: CJ gear comes down nose first, then mains |
Go look where you worked on the parts you mention, gotta be there, looks
like a little cap, fits on the nipple under the B nut In the IPB the are
called "dampers". You can in fact cause the gear to cone up in any order
you wish, by altering the size on hole in these restrictors.
I have them in stock if you have already cleaned the bench and swept the
floor. They are tiny little buggers, easy to miss.
Doug
On Sun, Sep 10, 2017 at 10:26 AM, Walter Lannon <wlannon@shaw.ca> wrote:
>
> Check for presence and size of restrictors ref. pg. 105/106 of Tech. Specs.
>
> Walt
>
> -----Original Message----- From: JL2A
> Sent: Sunday, September 10, 2017 2:31 AM
> To: yak-list@matronics.com
> Subject: Yak-List: CJ gear comes down nose first, then mains
>
>
> Hi all, looking for a plausible explanation:
>
> We recently replaced MLG uplocks, MLG uplock actuators, lines, shuttle
> valve (on uplocks), hoses and solid air lines of the MLG. Also one new
> actuator, the other two were new in the last few years. The NLG uplock
> actuator is off a 2003 built CJ. The shuttle valves on NLG and MLG
> actuators are old but seemingly serviceable.
>
> After conducting flight with gear handle in UP position, selecting DOWN
> has the nose gear releasing first, followed by the mains (more or less
> together). I'd have to double check but I think the nose gear is locked
> before the others start - I think the book specifies 2 second delay as ok
> with this sequence, this would be close but I'd love to know why.
>
> Strange behaviour. This aircraft has always been like this, I guess all
> this new stuff eliminates a few things, but any ideas on what it could be?
>
> ** If flight is conducted with gear handle NEUTRAL, then for gear
> extension it is selected UP 1-2-3 then DOWN, they all come out perfectly
> together. This is not how we normally operate, but it may have some bearing
> on it?***
>
> Our next move is to use Doug's shuttle valve referb kits on the older
> shuttle valves. Any other thoughts?
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=472733#472733
>
>
> ---
> This email has been checked for viruses by Avast antivirus software.
> https://www.avast.com/antivirus
>
>
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