Today's Message Index:
----------------------
1. 12:39 AM - CJ-6 flap issue (Jay McIntyre)
2. 03:55 AM - Re: CJ-6 flap issue (A. Dennis Savarese)
3. 04:21 AM - Re: CJ-6 flap issue (Mark Pennington)
4. 08:50 AM - Re: CJ-6 flap issue (Robin Hou)
5. 09:48 AM - Re: CJ-6 flap issue (Walter Lannon)
6. 04:25 PM - Re: CJ-6 flap issue (\)
Message 1
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Hi all,
One of the CJ's we look after has an annoying trait in that when the
aircraft has been sitting for a while and the air has bled off out of the
system the flaps come down.
As soon as air pressure is restored the flaps come back up. They function
normally and we cannot work out why it is doing it.
Have had flap actuator apart as part of routine inspections with no issues
noted, both diverter valves apart (again no issues and they appear to be
installed with correct orientation).
Any thoughts?
Regards, Jay
New Zealand
Message 2
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| Subject: | Re: CJ-6 flap issue |
Jay,What happens if you put both flap handles in the neutral position when
you leave the airplane and let it set for a period of time?=C2- Do the f
laps drop down?
You may have a main air valve leaking or the B nuts at the main air valve o
r at the main air tank leaking.=C2- Pay particular attention to the flare
s on the tubing under the B nuts because they are prone to cracking because
of over-tightening.=C2- Use the soapy water spray test on the fittings t
o see if there are any leaks.=C2- The main air valve may be suspect as we
ll.
Have you rebuilt the check valves on the firewall?
In your post you said the diverter valves and the flap actuator were taken
apart and inspected with no issues noted.=C2- But have you actually overh
auled them?=C2- Although you may not see anything defective during a disa
ssembly, like for example the internal seals, they could easily be worn and
allowing air to bleed past them.=C2-=C2- How long ago were the diverte
r valves and the flap actuator overhauled with new internal components?
Dennis
On Friday, October 9, 2020, 3:41:10 AM EDT, Jay McIntyre <cjaviator@gma
il.com> wrote:
Hi all,One of the CJ's we look after has an annoying trait=C2-in that wh
en the aircraft has been sitting for a while and the air has bled off out o
f the system the flaps come down.
As soon as air pressure is restored the flaps come back up. They function n
ormally and we cannot work out why it is doing it.
Have had flap actuator apart as part of routine inspections with no issues
noted, both diverter=C2-valves apart (again no issues and they appear to
be installed with correct orientation).Any thoughts?
Regards, Jay
New Zealand
Message 3
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| Subject: | Re: CJ-6 flap issue |
Jay
Dennis has good suggestions. I would ask, how far down does the flap
travel. If it is dropping down more than 1/2 inch check your flap bungee.
I had to replace mine, it looked fine, but on a very close inspection I
found many of the strands of rubber broken in several places. Hope this
helps. I know that Doug stocks the parts.
Mark
N621CJ
On Fri, Oct 9, 2020 at 6:59 AM A. Dennis Savarese <
dsavarese0812@bellsouth.net> wrote:
> Jay,
> What happens if you put both flap handles in the neutral position when you
> leave the airplane and let it set for a period of time? Do the flaps drop
> down?
>
> You may have a main air valve leaking or the B nuts at the main air valve
> or at the main air tank leaking. Pay particular attention to the flares on
> the tubing under the B nuts because they are prone to cracking because of
> over-tightening. Use the soapy water spray test on the fittings to see if
> there are any leaks. The main air valve may be suspect as well.
>
> Have you rebuilt the check valves on the firewall?
>
> In your post you said the diverter valves and the flap actuator were taken
> apart and inspected with no issues noted. But have you actually overhauled
> them? Although you may not see anything defective during a disassembly,
> like for example the internal seals, they could easily be worn and allowing
> air to bleed past them. How long ago were the diverter valves and the
> flap actuator overhauled with new internal components?
> Dennis
>
>
> On Friday, October 9, 2020, 3:41:10 AM EDT, Jay McIntyre <
> cjaviator@gmail.com> wrote:
>
>
> Hi all,
> One of the CJ's we look after has an annoying trait in that when the
> aircraft has been sitting for a while and the air has bled off out of the
> system the flaps come down.
> As soon as air pressure is restored the flaps come back up. They function
> normally and we cannot work out why it is doing it.
> Have had flap actuator apart as part of routine inspections with no issues
> noted, both diverter valves apart (again no issues and they appear to be
> installed with correct orientation).
> Any thoughts?
>
> Regards, Jay
> New Zealand
>
Message 4
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| Subject: | Re: CJ-6 flap issue |
Isn't the=C2-bungee cord supposed to keep the flap up when air is deplete
d? Just a thought :-)
Sent from Yahoo Mail on Android
On Fri, Oct 9, 2020 at 4:34, Mark Pennington<pennington.construction.inc.
1@gmail.com> wrote: Jay
Dennis has good suggestions.=C2- =C2-I would ask, how far down does the
flap travel.=C2- If it is dropping down more than 1/2 inch check your fl
ap bungee.=C2- =C2-I had to replace mine, it looked fine, but on a very
close inspection I found many of the strands of rubber broken in several p
laces.=C2- =C2-Hope this helps.=C2- =C2-I know that Doug stocks the
parts.
MarkN621CJ
On Fri, Oct 9, 2020 at 6:59 AM A. Dennis Savarese <dsavarese0812@bellsouth.
net> wrote:
Jay,What happens if you put both flap handles in the neutral position when
you leave the airplane and let it set for a period of time?=C2- Do the f
laps drop down?
You may have a main air valve leaking or the B nuts at the main air valve o
r at the main air tank leaking.=C2- Pay particular attention to the flare
s on the tubing under the B nuts because they are prone to cracking because
of over-tightening.=C2- Use the soapy water spray test on the fittings t
o see if there are any leaks.=C2- The main air valve may be suspect as we
ll.
Have you rebuilt the check valves on the firewall?
In your post you said the diverter valves and the flap actuator were taken
apart and inspected with no issues noted.=C2- But have you actually overh
auled them?=C2- Although you may not see anything defective during a disa
ssembly, like for example the internal seals, they could easily be worn and
allowing air to bleed past them.=C2-=C2- How long ago were the diverte
r valves and the flap actuator overhauled with new internal components?
Dennis
On Friday, October 9, 2020, 3:41:10 AM EDT, Jay McIntyre <cjaviator@gma
il.com> wrote:
Hi all,One of the CJ's we look after has an annoying trait=C2-in that wh
en the aircraft has been sitting for a while and the air has bled off out o
f the system the flaps come down.
As soon as air pressure is restored the flaps come back up. They function n
ormally and we cannot work out why it is doing it.
Have had flap actuator apart as part of routine inspections with no issues
noted, both diverter=C2-valves apart (again no issues and they appear to
be installed with correct orientation).Any thoughts?
Regards, Jay
New Zealand
Message 5
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| Subject: | Re: CJ-6 flap issue |
Hi Jay;
Is the bungee cord still attached and in reasonable condition?
Cheers;
Walt
From: Jay McIntyre
Sent: Friday, October 09, 2020 12:37 AM
Subject: Yak-List: CJ-6 flap issue
Hi all,
One of the CJ's we look after has an annoying trait in that when the aircra
ft has been sitting for a while and the air has bled off out of the system
the flaps come down.
As soon as air pressure is restored the flaps come back up. They function n
ormally and we cannot work out why it is doing it.
Have had flap actuator apart as part of routine inspections with no issues
noted, both diverter valves apart (again no issues and they appear to be in
stalled with correct orientation).
Any thoughts?
Regards, Jay
New Zealand
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Message 6
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There should be a bungee cord that would hold the flap up.
On Friday, October 9, 2020 Jay McIntyre <yak-list@matronics.com> wrote:
Hi all,One of the CJ's we look after has an annoying trait=C2-in that whe
n the aircraft has been sitting for a while and the air has bled off out of
the system the flaps come down.
As soon as air pressure is restored the flaps come back up. They function n
ormally and we cannot work out why it is doing it.
Have had flap actuator apart as part of routine inspections with no issues
noted, both diverter=C2-valves apart (again no issues and they appear to
be installed with correct orientation).Any thoughts?
Regards, Jay
New Zealand
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