REFLECTOR: Franklin Fuel Pumps

Wed Oct 3 12:25:15 CDT 2007

Wurzel,

Item "1" is bang on.  Install your spare pump and you're good to go.  Item "2" was not about the fuel pump drive but involves any and all gears in the Franklin.  The U.S. gears are cast iron and the PZL gears are steel with a slightly different tooth profile.  This combination makes metal in a big hurry.

If you want the whole ugly fuel pump story and or copies of the AD's, give me a call at 913 526-8534.

Larry Coen
N136LC SE/RG Franklin/IVO

  ----- Original Message ----- 
  From: wurzel parsons-keir 
  To: Velocity Aircraft Owners and Builders list 
  Sent: Tuesday, October 02, 2007 7:19 PM
  Subject: Re: REFLECTOR: Franklin Fuel Pumps

  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 

    ---------------------------------------------------
    Stop dreaming, start flying!  Ask me about AOPA Project Pilot,
    a mentoring program that will help you earn your pilot's license!

                       http://www.beapilot.com

    _______________________________________________
    To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector 

    Visit the gallery!  www.tvbf.org/gallery
    user:pw = tvbf:jamaicangoose
    Check new archives: www.tvbf.org/pipermail
    Check old archives: http://www.tvbf.org/archives/velocity/maillist.html

  -- 
  Mike W.
  1997 Velocity Elite RG
  Franklin /IVO Electric CS 

------------------------------------------------------------------------------

  _______________________________________________
  To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector

  Visit the gallery!  www.tvbf.org/gallery
  user:pw = tvbf:jamaicangoose
  Check new archives: www.tvbf.org/pipermail
  Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.tvbf.org/mailman/private/reflector/attachments/20071003/4c6211e3/attachment.htm 