Today's Message Index:
----------------------
1. 01:08 AM - fuel fee-oil leak-manuals (Mark Jefferies)
2. 06:06 AM - Re:Fuel Tanks (Ernie)
3. 06:31 AM - Re: Re:Fuel Tanks (Gus Fraser)
4. 07:58 AM - Re: Re:Fuel Tanks (Ernie)
5. 12:21 PM - Re: Re:Fuel Tanks (Gus Fraser)
6. 01:19 PM - Struts (Ernie)
7. 03:10 PM - Re: Struts (bob fitz)
8. 08:51 PM - TCP (D Zeman)
9. 11:25 PM - Red Star 2003, date clarification. (Drew Blahnick)
10. 11:36 PM - Re: Yak-List Digest: 2 Msgs - 12/26/02 (F4cmac@aol.com)
Message 1
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| Subject: | fuel fee-oil leak-manuals |
--> Yak-List message posted by: "Mark Jefferies" <mark@yakuk.com>
Ernie & all.
Gus and others have written about flying in balance, this is easy to do. Next issues.
The check valves sometimes stick shut through (I suspect) capillary action
when the faces of the valve become very smooth. I have seen on a YAK 18T we
purchased the faces has 3 small centre punch marks effectively preventing the
capillary action. We have also found through poor care during manufacture that
the axis of the shaft that supports the swinging valve has been out of line
comparing to the horizontal flight path.
I believe all 3 of the above will fix your problem.
The leak behind the prop is most likely the drive shaft seal. Not easy to replace,
gear box off, special tools to disassemble etc. The seal is a common metric
size. Special lock tabs will also need to be obtained.
Gear lifters. In FSU times the a/c had 500 hrs overhauls every 5 years. Its a back
to works process. The manuals you have WILL NOT have any overhaul information
in them. You will only have line maintenance as these items would not require
OH in the field. Simple as that!! The OH manual for the u/c jacks is about
approx 30 pages I think.
The complete technical information you are requesting costs 15,000$ and is approximately
20,000 pages. As far as I know only 4 complete copies exist and we hold
one of those, unfortunately the terms of the licence do not permit us to copy
and distribute.
So, best you do the job and write it up for everyone's benefit :))
We invested this amount (15K) along with a lot of tooling to permit us to OVERHAUL
the Yak 52. Hence if you see advertised using the word overhaul by any other
company (aerostar, and 2 Russian companies excepted) or individual you will
know that the aircraft in question is not overhauled but that the word is being
used to describe an unqualified repair, IRAN would be a better description
I believe. A true overhaul costs money, something people try and save rather than
spend hence corners are cut!!
happy new year, mark
--> Yak-List message posted by: "Ernie" <ernest.martinez@oracle.com>
Lately my fuel imbalance has been getting worse. Today I flew and came back with
the left tank almost on 0 and the right tank on 50. This has got to be something
more than just flying out of trim. I understand that there are check valves
between the wing tanks and the floor tank. Can they be inspected?
Also I've developed a small oil leak behind the prop on the shaft. The gills are
getting oily and there is usually a small pool of oil on the gill inner ring.
Where is this oil most likely coming from, the shaft/engine seal, or the prop
ring?
And finally, I saw a thread regarding the air seals in the gear actuators. Has
any one written up an overhaul procedure for these. I cant find anything in my
manuals. Actually my manuals don't seem to have anything of much relevance to
day to day maintenance. Am I missing a manual. I have the engine manual (which
doesn't have much info either) and the "CHUJIA-6 Airplane Technical Specification
for Service and Maintenance" which in my opinion stinks. What I'm looking
for is a manual which explains the maintenance procedures. Does such a manual
exist?
Ernie
Message 2
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--> Yak-List message posted by: "Ernie" <ernest.martinez@oracle.com>
Thanks for all the info guys, this list is better than any manual. I'll check the
rudder trim tabs first if that doesnt help, I'll check the flapper valves.
Since the left tank is always twice as empty as the right tank, lets assume its
just a trim problem, since some fuel is in fact leaving the right tank. What
will happen when the left tank goes empty? I dont have a mental picture of the
flapper valve and dont yet know if its 2 valves or just 1. I just want to make
sure that I dont get a very quiet airplane if one tank were to run dry, even
though I rarely leave the vicinity of my airport and have been landing before
that ha happened for fear of fuel starvation.
Also I discovered another little problem with my beloved plane. When I steped out
of it yesterday I noticed it was a little cocked to the left. When I got out
I noticed the right oleo was compressed. I lifted the wing and it popped back
up. I then pushed down on the wing and I was able to compress it a good 4 inches.
I then went over to the left wing and I could barely budge it, so I guess
I need to add gas to the stut.
Is there any magic to adding gas, is it a special fitting that I'll never find,
and do I have to use nitrogen, or can I use air since I dont go o altitudes.
Also what pressure should it be charged up to, and what do you guys use as a pressure
guage?
Ernie
Message 3
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--> Yak-List message posted by: Gus Fraser <fraseg@comcast.net>
The valves are either side of the header tank on the feed in from the main
tanks. They are really one way valves they are needed to stop cross flow
between either tank when flying with yaw in. It is quite possible that you
could get no fuel with a full tank if one of the valves were blocked. But,
as you say, it appears that fuel is feeding from both so it is probably the
case that it is a trim issue.
Regarding the gear jacks did you see my posts the other day about my gear ?
My aircraft is a 1996 and my nose gear seal has just started playing up,
right on time
:(
I am going to get all three serviced. I am getting mine done at Gesoco
(George Coy) I feel quite confident about getting them off and replacing the
seals but setting up the piston extension and refitting with the correct
adjustments I have not done and do not feel happy about.
Hope you sort it out.
Gus
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com]On Behalf Of Ernie
Subject: Yak-List: Re:Fuel Tanks
--> Yak-List message posted by: "Ernie" <ernest.martinez@oracle.com>
Thanks for all the info guys, this list is better than any manual. I'll
check the rudder trim tabs first if that doesnt help, I'll check the flapper
valves. Since the left tank is always twice as empty as the right tank, lets
assume its just a trim problem, since some fuel is in fact leaving the right
tank. What will happen when the left tank goes empty? I dont have a mental
picture of the flapper valve and dont yet know if its 2 valves or just 1. I
just want to make sure that I dont get a very quiet airplane if one tank
were to run dry, even though I rarely leave the vicinity of my airport and
have been landing before that ha happened for fear of fuel starvation.
Also I discovered another little problem with my beloved plane. When I
steped out of it yesterday I noticed it was a little cocked to the left.
When I got out I noticed the right oleo was compressed. I lifted the wing
and it popped back up. I then pushed down on the wing and I was able to
compress it a good 4 inches. I then went over to the left wing and I could
barely budge it, so I guess I need to add gas to the stut.
Is there any magic to adding gas, is it a special fitting that I'll never
find, and do I have to use nitrogen, or can I use air since I dont go o
altitudes. Also what pressure should it be charged up to, and what do you
guys use as a pressure guage?
Ernie
Message 4
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--> Yak-List message posted by: "Ernie" <ernest.martinez@oracle.com>
Well I know that there is a fill valve on the gear leg, I just want to know
how to go about pressurizing it. I have a spare oleo, but why bother if all
I need to do is add gas.
Ernie
----- Original Message -----
From: "Gus Fraser" <fraseg@comcast.net>
Subject: RE: Yak-List: Re:Fuel Tanks
> --> Yak-List message posted by: Gus Fraser <fraseg@comcast.net>
>
> The valves are either side of the header tank on the feed in from the main
> tanks. They are really one way valves they are needed to stop cross flow
> between either tank when flying with yaw in. It is quite possible that you
> could get no fuel with a full tank if one of the valves were blocked. But,
> as you say, it appears that fuel is feeding from both so it is probably
the
> case that it is a trim issue.
>
> Regarding the gear jacks did you see my posts the other day about my gear
?
> My aircraft is a 1996 and my nose gear seal has just started playing up,
> right on time
> :(
>
> I am going to get all three serviced. I am getting mine done at Gesoco
> (George Coy) I feel quite confident about getting them off and replacing
the
> seals but setting up the piston extension and refitting with the correct
> adjustments I have not done and do not feel happy about.
>
> Hope you sort it out.
>
> Gus
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com]On Behalf Of Ernie
> To: yak-list@matronics.com
> Subject: Yak-List: Re:Fuel Tanks
>
>
> --> Yak-List message posted by: "Ernie" <ernest.martinez@oracle.com>
>
> Thanks for all the info guys, this list is better than any manual. I'll
> check the rudder trim tabs first if that doesnt help, I'll check the
flapper
> valves. Since the left tank is always twice as empty as the right tank,
lets
> assume its just a trim problem, since some fuel is in fact leaving the
right
> tank. What will happen when the left tank goes empty? I dont have a mental
> picture of the flapper valve and dont yet know if its 2 valves or just 1.
I
> just want to make sure that I dont get a very quiet airplane if one tank
> were to run dry, even though I rarely leave the vicinity of my airport and
> have been landing before that ha happened for fear of fuel starvation.
>
> Also I discovered another little problem with my beloved plane. When I
> steped out of it yesterday I noticed it was a little cocked to the left.
> When I got out I noticed the right oleo was compressed. I lifted the wing
> and it popped back up. I then pushed down on the wing and I was able to
> compress it a good 4 inches. I then went over to the left wing and I could
> barely budge it, so I guess I need to add gas to the stut.
>
> Is there any magic to adding gas, is it a special fitting that I'll never
> find, and do I have to use nitrogen, or can I use air since I dont go o
> altitudes. Also what pressure should it be charged up to, and what do you
> guys use as a pressure guage?
>
> Ernie
>
>
Message 5
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--> Yak-List message posted by: Gus Fraser <fraseg@comcast.net>
Ah your talking about the strut I thought you were talking about the gear
actuator.
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com]On Behalf Of Ernie
Subject: Re: Yak-List: Re:Fuel Tanks
--> Yak-List message posted by: "Ernie" <ernest.martinez@oracle.com>
Well I know that there is a fill valve on the gear leg, I just want to know
how to go about pressurizing it. I have a spare oleo, but why bother if all
I need to do is add gas.
Ernie
----- Original Message -----
From: "Gus Fraser" <fraseg@comcast.net>
Subject: RE: Yak-List: Re:Fuel Tanks
> --> Yak-List message posted by: Gus Fraser <fraseg@comcast.net>
>
> The valves are either side of the header tank on the feed in from the main
> tanks. They are really one way valves they are needed to stop cross flow
> between either tank when flying with yaw in. It is quite possible that you
> could get no fuel with a full tank if one of the valves were blocked. But,
> as you say, it appears that fuel is feeding from both so it is probably
the
> case that it is a trim issue.
>
> Regarding the gear jacks did you see my posts the other day about my gear
?
> My aircraft is a 1996 and my nose gear seal has just started playing up,
> right on time
> :(
>
> I am going to get all three serviced. I am getting mine done at Gesoco
> (George Coy) I feel quite confident about getting them off and replacing
the
> seals but setting up the piston extension and refitting with the correct
> adjustments I have not done and do not feel happy about.
>
> Hope you sort it out.
>
> Gus
>
> -----Original Message-----
> From: owner-yak-list-server@matronics.com
> [mailto:owner-yak-list-server@matronics.com]On Behalf Of Ernie
> To: yak-list@matronics.com
> Subject: Yak-List: Re:Fuel Tanks
>
>
> --> Yak-List message posted by: "Ernie" <ernest.martinez@oracle.com>
>
> Thanks for all the info guys, this list is better than any manual. I'll
> check the rudder trim tabs first if that doesnt help, I'll check the
flapper
> valves. Since the left tank is always twice as empty as the right tank,
lets
> assume its just a trim problem, since some fuel is in fact leaving the
right
> tank. What will happen when the left tank goes empty? I dont have a mental
> picture of the flapper valve and dont yet know if its 2 valves or just 1.
I
> just want to make sure that I dont get a very quiet airplane if one tank
> were to run dry, even though I rarely leave the vicinity of my airport and
> have been landing before that ha happened for fear of fuel starvation.
>
> Also I discovered another little problem with my beloved plane. When I
> steped out of it yesterday I noticed it was a little cocked to the left.
> When I got out I noticed the right oleo was compressed. I lifted the wing
> and it popped back up. I then pushed down on the wing and I was able to
> compress it a good 4 inches. I then went over to the left wing and I could
> barely budge it, so I guess I need to add gas to the stut.
>
> Is there any magic to adding gas, is it a special fitting that I'll never
> find, and do I have to use nitrogen, or can I use air since I dont go o
> altitudes. Also what pressure should it be charged up to, and what do you
> guys use as a pressure guage?
>
> Ernie
>
>
Message 6
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--> Yak-List message posted by: "Ernie" <ernest.martinez@oracle.com>
Ok, I removed the cap on the main strut gas filler valve, and..........I dont know
what to make of it. Does the center piece need to be depressed in order to
charge the strut? Can I use air? Does the charge fitting screw on in place of
the cap or does something screw "Inside" the fitting?
I received a reply earlier at work about making a fitting, but I lost it, can you
resend it along with a little more explanation.
Thanks
Ernie
Message 7
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--> Yak-List message posted by: "bob fitz" <rmfitz@direcway.com>
Ernie
Re.gas flow: check out Craigs advice before you mess with rudder trim.
If the plane is not level and you fly with the ball centered all you'll
get out of changing trim is a sore leg.
Re struts: I show ranges of 279-294# main and 382-400# nose for the 52.
CJ may differ but probably a job for nitrogen. That center piece you see
is a check valve. The cheap way of filling struts (once you have the
adapter to get N into the fitting) is to fill watching the gauge on the
regulator. Then remove the hose and if it's overfull bleed the pressure
down by gently tapping that check valve with a punch. BE CAREFUL.
The right way is to get the proper tool that seals the fitting, then
allows you to open/close the check valve while you add the correct
pressure. Got mine from Carl Hays, I think it was$150. Have seen deluxe
models for $300+ with gauges.
bob
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Ernie
Subject: Yak-List: Struts
--> Yak-List message posted by: "Ernie" <ernest.martinez@oracle.com>
Ok, I removed the cap on the main strut gas filler valve, and..........I
dont know what to make of it. Does the center piece need to be depressed
in order to charge the strut? Can I use air? Does the charge fitting
screw on in place of the cap or does something screw "Inside" the
fitting?
I received a reply earlier at work about making a fitting, but I lost
it, can you resend it along with a little more explanation.
Thanks
Ernie
=
direct advertising on the Matronics Forums.
Message 8
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--> Yak-List message posted by: D Zeman <curious_wings@yahoo.com>
I have had 2 instances of multiple lead plug fouling
with my M14P this winter. I am positive it is due to
the longer fast idle to temp times.
I am not an additive kind of guy, but I am considering
Alcor's TCP to reduce this sort of thing. Has anyone
had any experience or can comment first hand on the
subject?
Thanks in advance,
D. Zeman
Message 9
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| Subject: | Red Star 2003, date clarification. |
--> Yak-List message posted by: "Drew Blahnick" <aapilot@adelphia.net>
Let me clarify something about the dates for the West Coast Red Star Gathering;
The 2nd Annual Red Star event is scheduled for Wednesday April 30 through May 4th.
Early arrivals/long-haul flyers for FAST training may arrive on the 29th,
as billeting will be provided.
Thanks,
Drew Allen Blahnick
310.386.9181
www.allredstar.com
California Condors Squadron
"Communism: Lousy Politics - Great Airplanes"
Message 10
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| Subject: | Re: Yak-List Digest: 2 Msgs - 12/26/02 |
--> Yak-List message posted by: F4cmac@aol.com
please remove my name from your mailing list, I am not interested in Yak
aircraft.
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