REFLECTOR: Franklin Fuel Pumps
wurzel parsons-keir
wurzel at ccpu.com
Wed Oct 3 02:19:00 CDT 2007
Hi, Michael! Sorry my first email wasn't very clear.
My engine is a 6A-350-C1, just as you said, and I love it very much.
:-)
Mine is carbureted (no fuel injection). I also have no primer. (I saw
a
discussion about primers going back through the archives.) I have
the electric IVO and the prop itself works great. I tried buying the
prop governor from IVO and it didn't work well, so I'm still working on
a
good solution for a governor.
But back to the fuel pump issue...
The PLL-7-6R is a PZL-supplied sliding vane type fuel pump.
I looked at all of the Franklin documents on tvbf.org, and all of them
are from 2002 or earlier. So, the service bulletin from 2003 isn't
there.
I think what I've gathered is the following:
1) In 2002, PZL said all diaphragm pumps had to be replaced. (and
the PZL-supplied
replacement is the PLL-7-6R).
2) In 2003, the FAA put out some kind of notice saying that you
could NOT mix
american-made fuel pump drive gears with polish-made engines and
vice-versa.
If you wanted to put a franklin-america fuel pump into a PZL
engine, you had to
swap drive gears on one side or the other so that they are both
US or both Polish,
due to a small diameter difference.
I don't know if the 2003 notice from the FAA is essentially the same
content as
the 2003 service bulletin from PZL.
So out of curiosity, do you have a franklin fuel pump (ie, PLL-7-6R) or
a Weldon
or some other replacement? Are you fuel-injected?
Thanks,
-wurzel
________________________________
From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Michael Watson
Sent: Tuesday, October 02, 2007 1:55 PM
To: Velocity Aircraft Owners and Builders list
Subject: Re: REFLECTOR: Franklin Fuel Pumps
Wurzel,
What is a PLL-7-6R Franklin engine? I though the Franklin engines
used on the Velocity aircraft was the 6A-350-C1.
If that's what you have, there was a AD issued to replace the
piston type fuel pump with a vane type. The AD can be found
on www.tvbf.org under Franklin engines. The Franklin is and
outstanding engine.
On 10/2/07, wurzel parsons-keir <wurzel at ccpu.com> wrote:
After an otherwise lovely flight yesterday, I found blue fuel
spatter around the vent tube coming from my fuel pump. I
understand
that means some seal isn't good any more and I'm grounded
until it's fixed.
I've gone back through various reflector postings on Franklin
fuel pumps, but I'm not sure I have all the information.
My engine has a PLL-7-6R which was installed in Dec 2002.
I don't see anything in the logbook to suggest that
AD # SP- 0048-2003-B was complied with. I'm having trouble
finding Service Bulletins No. PZL-F/75/2003 using
Google. I see lots of references to it, but not the
actual document. Any pointers?
Rick (builder of N570) had a theory when he built the
airplane...
"assume every company is going to go out of business and buy two
of everything". So I have a brand-new PLL-7-6R sitting in a
box. From the paperwork it looks like it was produced
in 2002, also before the Service Bulletin.
So, from those who are more familiar with this:
1) Are all PLL-7s junk, or is there some chance I have a
workable
spare here?
2) Any pointer on where to find the Service bulletin?
3) Do these pumps have any replacable washers/gaskets etc so
that I could just rebuild the pump that is installed rather
than using my new one? The one that's on there only
has 200 hours on it.
4) I saw the previous posts mentioning a weldon replacement.
It sounded like that was a diaphagm type? Is there any
reason
I would want to go back to that instead of the sliding vane?
Many thanks,
-wurzel
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--
Mike W.
1997 Velocity Elite RG
Franklin /IVO Electric CS
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