REFLECTOR: Franklin Fuel Pumps

Wed Oct 3 07:57:32 CDT 2007

I have two vane pumps for sale that have been compiled with the AD.

I also have the papers.  I'll see about getting them scanned in and put 
on he site.

wurzel parsons-keir wrote:
> 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 <http://www.tvbf.org> under Franklin engines. The 
> Franklin is and
> outstanding engine.
> 
> 
> 
> On 10/2/07, *wurzel parsons-keir *<wurzel at ccpu.com 
> <mailto: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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