Today's Message Index:
----------------------
1. 10:26 AM - Nitrogen Loss (Anthony Royal)
2. 06:19 PM - Re: Nitrogen Loss (Frank Deeth)
3. 06:22 PM - Re: Nitrogen Loss (Bill Geipel)
4. 08:19 PM - Re: Nitrogen Loss (Bill Culberson)
Message 1
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Guys, =C2-my L-29 has always held nitrogen for days without much loss of
pressure. Other day I pressurized to 140 atm because of a long flight and d
ay. Pressure bled off immediately from 140 to about 90 atm before I could g
et out of the hangar. =C2-And was totally empty the next day. I found sev
eral loose, original safety wired, connections not tight. Packing nut on th
e nitrogen purge valve was loose too. Tightened every fitting and thing I c
ould find from nose to rear cockpit. =C2-
Now, if I pressurize to 50 atm, I will lose 30 atm in 12 hours. If I pressu
rize to 100 atm I lose 30 atm in 12 hours. Very consistent now. =C2-That'
s about 2.5 atm per hour. =C2-Any suggestions what else might cause such
a consistent leak? Thinking maybe the pressure relief valve leaking? Check
valve? =C2-Reading manuals and reviewing diagrams but thought maybe someo
ne else may have run into this same problem and save a lot of time
Someone, in a post I can't find, suggested an ultrasonic tester of some sor
t to detect high pressure leaks. Does anyone know which one it was?
Also, looking for the glass lens for the taxi light. Rock must have hit min
eand cracked it in half. Glued it back but would like to replacement. =C2
-Also looking for connector to ARC EA-401A encoding altimeter.
Thanks for any info
Anthony
Message 2
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| Subject: | Re: Nitrogen Loss |
Anthony,
The post about the ultra sonic tester was, I think, originally to do with th
e thread about the electric air pump system installed in the nose section an
d used to pump up the pneumatic system as required. I think the jet was/is b
ased in Sweden or Norway? FWIW I think I saw recently that jet is now for sa
le too?
Cheers,
Frank
Sent from my iPad
> On Mar 24, 2016, at 2:22 AM, Anthony Royal <skyking76t@verizon.net> wrote:
>
> Guys, my L-29 has always held nitrogen for days without much loss of pres
sure. Other day I pressurized to 140 atm because of a long flight and day. P
ressure bled off immediately from 140 to about 90 atm before I could get out
of the hangar. And was totally empty the next day. I found several loose, o
riginal safety wired, connections not tight. Packing nut on the nitrogen pur
ge valve was loose too. Tightened every fitting and thing I could find from n
ose to rear cockpit.
>
> Now, if I pressurize to 50 atm, I will lose 30 atm in 12 hours. If I press
urize to 100 atm I lose 30 atm in 12 hours. Very consistent now. That's abo
ut 2.5 atm per hour. Any suggestions what else might cause such a consisten
t leak? Thinking maybe the pressure relief valve leaking? Check valve? Read
ing manuals and reviewing diagrams but thought maybe someone else may have r
un into this same problem and save a lot of time
>
> Someone, in a post I can't find, suggested an ultrasonic tester of some so
rt to detect high pressure leaks. Does anyone know which one it was?
>
> Also, looking for the glass lens for the taxi light. Rock must have hit mi
neand cracked it in half. Glued it back but would like to replacement. Also
looking for connector to ARC EA-401A encoding altimeter.
>
> Thanks for any info
>
> Anthony
Message 3
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| Subject: | Re: Nitrogen Loss |
Remove the front seat and the floor boards to the left of the stick and
the stick boot. 2 Brake valves on the left. Check the lower one
that is hardest to get to. 19mm. good luck. need a small, bent, twisted
wrench.
On Mar 23, 2016, at 9:22, Anthony Royal <skyking76t@verizon.net> wrote:
> Guys, my L-29 has always held nitrogen for days without much loss of
pressure. Other day I pressurized to 140 atm because of a long flight
and day. Pressure bled off immediately from 140 to about 90 atm before I
could get out of the hangar. And was totally empty the next day. I
found several loose, original safety wired, connections not tight.
Packing nut on the nitrogen purge valve was loose too. Tightened every
fitting and thing I could find from nose to rear cockpit.
>
> Now, if I pressurize to 50 atm, I will lose 30 atm in 12 hours. If I
pressurize to 100 atm I lose 30 atm in 12 hours. Very consistent now.
That's about 2.5 atm per hour. Any suggestions what else might cause
such a consistent leak? Thinking maybe the pressure relief valve
leaking? Check valve? Reading manuals and reviewing diagrams but
thought maybe someone else may have run into this same problem and save
a lot of time
>
> Someone, in a post I can't find, suggested an ultrasonic tester of
some sort to detect high pressure leaks. Does anyone know which one it
was?
>
> Also, looking for the glass lens for the taxi light. Rock must have
hit mineand cracked it in half. Glued it back but would like to
replacement. Also looking for connector to ARC EA-401A encoding
altimeter.
>
> Thanks for any info
>
> Anthony
Message 4
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The valve Bill is talking about is the one I had a problem with. Find a sma
ll guy that's good with tools. In my case, fitting was loose...tightened an
d all was well.
Bill
N39DE
Sent from my T-Mobile 4G LTE Device
-------- Original message --------
From: Bill Geipel <l129bs@gmail.com>
Subject: Re: L29-List: Nitrogen Loss
Remove the front seat and the floor boards to the left of the stick and the
stick boot. 2 Brake valves on the left. Check the lower one
that is hardest to get to. 19mm. good luck. need a small, bent, twisted wre
nch.
On Mar 23, 2016, at 9:22, Anthony Royal <skyking76t@verizon.net<mailto:skyk
ing76t@verizon.net>> wrote:
Guys, my L-29 has always held nitrogen for days without much loss of press
ure. Other day I pressurized to 140 atm because of a long flight and day. P
ressure bled off immediately from 140 to about 90 atm before I could get ou
t of the hangar. And was totally empty the next day. I found several loose
, original safety wired, connections not tight. Packing nut on the nitrogen
purge valve was loose too. Tightened every fitting and thing I could find
from nose to rear cockpit.
Now, if I pressurize to 50 atm, I will lose 30 atm in 12 hours. If I pressu
rize to 100 atm I lose 30 atm in 12 hours. Very consistent now. That's abo
ut 2.5 atm per hour. Any suggestions what else might cause such a consiste
nt leak? Thinking maybe the pressure relief valve leaking? Check valve? Re
ading manuals and reviewing diagrams but thought maybe someone else may hav
e run into this same problem and save a lot of time
Someone, in a post I can't find, suggested an ultrasonic tester of some sor
t to detect high pressure leaks. Does anyone know which one it was?
Also, looking for the glass lens for the taxi light. Rock must have hit min
eand cracked it in half. Glued it back but would like to replacement. Also
looking for connector to ARC EA-401A encoding altimeter.
Thanks for any info
Anthony
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