Likes Likes:  0
Results 1 to 37 of 37

Thread: Slick Magneto Service Bulletin.

  1. #1
    Steve Pierce's Avatar
    Join Date
    Mar 2002
    Location
    Graham, TX
    Posts
    18,649
    Post Thanks / Like

    Slick Magneto Service Bulletin.

    If you have installed new Slick Magnetos in the last 4 years you might want to read Lycoming Service Bulletin 583 and 584.
    http://www.lycoming.textron.com/supp...ions/index.jsp
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  2. #2
    Speedo's Avatar
    Join Date
    Jul 2002
    Location
    AK
    Posts
    1,718
    Post Thanks / Like
    Thanks for posting that Steve. A new 100 hour check: sheesh. Wish they'd build them right the first time.
    Speedo

  3. #3

    Join Date
    Oct 2003
    Location
    Western Iowa
    Posts
    50
    Post Thanks / Like
    Thanks for the heads up. I installed a factory reman two years ago so I will have a look.

  4. #4
    Steve Pierce's Avatar
    Join Date
    Mar 2002
    Location
    Graham, TX
    Posts
    18,649
    Post Thanks / Like
    I talked to Joe Logie at Unison this morning. Seems their vendor moved and somehow got contamination in the material they make their cams out of and they have seen abnormal wear in mostly the six cylinder mags. There should be replacement cams later this week as a terminating action. The carbon brushes were failing/wearing at a higher rate than Unison liked so they changed them and the new ones are failing faster than the old ones. The new ones can wear to the point of failure within an hour where the old ones could be caught at a bad mag check. There is no terminating action on them as of yet. Improved carbon brush is at least 6 weeks out.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  5. #5
    behindpropellers's Avatar
    Join Date
    Feb 2003
    Location
    NE Ohio
    Posts
    6,692
    Post Thanks / Like
    Steve-

    Do you know if this is also the case on Continentals?

    Tim

  6. #6
    Steve Pierce's Avatar
    Join Date
    Mar 2002
    Location
    Graham, TX
    Posts
    18,649
    Post Thanks / Like
    TCM magnetos are not effected. I am researching all the new Slicks, or new engines with Slicks, I have installed in the effected time period. No fun.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  7. #7
    fadec's Avatar
    Join Date
    Oct 2007
    Location
    Mooresville, NC
    Posts
    154
    Post Thanks / Like
    Quote Originally Posted by Steve Pierce
    TCM magnetos are not effected. I am researching all the new Slicks, or new engines with Slicks, I have installed in the effected time period. No fun.

    That's the best part of our job....research!

  8. #8

    Join Date
    May 2006
    Location
    Simi Valley, CA
    Posts
    153
    Post Thanks / Like
    The Slick SB does not seem distinguish between Cont. and Lyc.....
    I put a new 4301 Mag on my Cub about a month ago and got the timing shift after a few hours they are talking about....Looks like I need to pull that mag tonight.
    DaveG

  9. #9
    hottshot's Avatar
    Join Date
    Jun 2002
    Location
    Joseph ,Or
    Posts
    1,081
    Post Thanks / Like
    Had it happen in one of our Maules worn down to the nubbs

  10. #10

    Join Date
    May 2002
    Location
    Akureyri
    Posts
    252
    Post Thanks / Like
    An overhaul shop in the US is is shipping a rebuilt O-360 to me in a week or so. It has new 43 series Slick mags.

    This is their explanation to the situation:
    "Although the magneto S/N's are 08012676 and 08032042...this SB is not applicable as there can be no magneto cam wear ( New Engine, New Mags ) you will have to address this SB at 100 hours or annual."

    This means that I will have to remove the magnetos every 100 hrs for inspection? I don't look forward to this.

    Or... should I ask them to delay shipping and wait for a permanent correction to the problem?

    Any advise appreciated.
    Vidir

  11. #11
    Steve Pierce's Avatar
    Join Date
    Mar 2002
    Location
    Graham, TX
    Posts
    18,649
    Post Thanks / Like
    I would delay shipment. The 100 hr check is simply timing for worn cams. The replacement cams that are terminating action should be out by the end of the week. The brush has to be inspected every 15-20 hours until they reach 50. That is unreasonable to me and they are at least 6 weeks out of a fix. Can you request TCM (Bendix) magnetos?
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  12. #12
    JPachl's Avatar
    Join Date
    Aug 2007
    Location
    Forsyth Montana
    Posts
    143
    Post Thanks / Like
    Thanks Steve for the post. I just put new mags on about 3 weeks ago.
    "If you want to be successful,it's just this simple. Know what you are doing. Love what you are doing. And beleive in what you are doing." Will Rogers

  13. #13

    Join Date
    May 2002
    Location
    Akureyri
    Posts
    252
    Post Thanks / Like
    Steve, thanks for the reply.

    I agree this is to much of a handicap accepting the Slicks with such faults.

    I will check the options.
    By the way, this is Lycon.

  14. #14
    Steve Pierce's Avatar
    Join Date
    Mar 2002
    Location
    Graham, TX
    Posts
    18,649
    Post Thanks / Like
    Vidir, I have a set of core Slicks I can check the dimensions on the carbon brushes and cams and ship them to Ken.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  15. #15

    Join Date
    May 2002
    Location
    Akureyri
    Posts
    252
    Post Thanks / Like
    Steve,
    Thank you much for your offer.
    I was just replying to an e-mail from Chris at Lycon. They can offer the Bendix upgrade and I'm leaning towards selecting them. He is checking for the price though.

  16. #16
    180Marty's Avatar
    Join Date
    May 2004
    Location
    Paullina, Ia
    Posts
    2,025
    Post Thanks / Like
    How did they change something as simple as a carbon brush to have such a problem? The glue or whatever holds the carbon together?

  17. #17
    fadec's Avatar
    Join Date
    Oct 2007
    Location
    Mooresville, NC
    Posts
    154
    Post Thanks / Like
    Ive called Unison twice today, at each location to see if there are replacement parts, brushes, that terminate this SB. No answer so far does anyone know?
    Thanks

    Glenn

  18. #18
    Steve Pierce's Avatar
    Join Date
    Mar 2002
    Location
    Graham, TX
    Posts
    18,649
    Post Thanks / Like
    Glenn, I have a direct line to the guy in the know. It is after hours there now but I left a message and will follow up when they open up in the morning and let you know.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  19. #19
    fadec's Avatar
    Join Date
    Oct 2007
    Location
    Mooresville, NC
    Posts
    154
    Post Thanks / Like
    Thanks Steve.

    Glenn
    704 902-6986

  20. #20
    Steve Pierce's Avatar
    Join Date
    Mar 2002
    Location
    Graham, TX
    Posts
    18,649
    Post Thanks / Like
    Talked to Slick this morning. Here is the latest revision on the cams. Gives dates and checks for terminating action. They are flying the brushes now and testing.

    http://www.supercub.org/photopost/da..._corrected.pdf
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  21. #21
    fadec's Avatar
    Join Date
    Oct 2007
    Location
    Mooresville, NC
    Posts
    154
    Post Thanks / Like
    Just received the same call, they told me 3-5 weeks out for terminating replacement parts

    Thanks

  22. #22

    Join Date
    Nov 2004
    Location
    Sulphur Springs, Texas
    Posts
    147
    Post Thanks / Like
    Due to this post, I asked Superior and my mags on the new engine are affected under these SB's.

    Why the two different SB's with 2 different ranges of Serial numbers??
    My mags begin with 0608 and are affected under SB 3-08, but not under the serial number range of SB 2-08 from Slick.

    I must be missing something which you pro's can explain.

    I know this could effect my taking the plane to Osh unless I can get resolution soon, as well as parts. I have 40.2 hours on the engine and will put on 10 more before leaving for Oshkosh with 2 souls on board which I care about very much - mine and my wife's. Help!!!
    Gene Herzog
    Texas Smith Cub Builder

  23. #23
    Steve Pierce's Avatar
    Join Date
    Mar 2002
    Location
    Graham, TX
    Posts
    18,649
    Post Thanks / Like
    There are two different problems. The cams and the brushes. Check your timing, if you don't have more than a 4 degree drift you are good. Going from memory and a late night.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  24. #24

    Join Date
    Nov 2003
    Location
    KOSH
    Posts
    112
    Post Thanks / Like
    From what I just read in the SB linked above, it's the brushes and coils, not the timing/cam wear, that are in question on Mr. Herzog's magnetos, based on serial numbers. I recently pulled a pair of brushes and coils due to SB 3-08. I don't know the current status of replacements, but it was a challenge a few weeks ago already. Sounds like Airventure will come and go before the brush revisions are available.

    If you're experimental, are you still mandated by these MSB's?

  25. #25
    Steve Pierce's Avatar
    Join Date
    Mar 2002
    Location
    Graham, TX
    Posts
    18,649
    Post Thanks / Like
    Check here for the information on the cams.
    http://www.supercub.org/photopost/da..._corrected.pdf

    Only ADs are manatory for part 91 airplanes. SBs are recommended if you are certified or experimental.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  26. #26

    Join Date
    Nov 2003
    Location
    KOSH
    Posts
    112
    Post Thanks / Like
    Steve P.,
    If the manufacturer's instructions require adherence to SB's and the like, and the FAR's require adherence to the manufacturer's instructions, doesn't that make SB's and the like mandatory in a roundabout way? (referring to certified aircraft)
    Not to suggest anything unsafe by any means, but an experimental aircraft would not technically be affected by the SB's in question. Of course, explaining that to a wife might prove to be the bigger burden.

    Regarding the brush/coil inspection, SB 3-08, here's something from the boss on July 10th
    http://rgl.faa.gov/Regulatory_and_Gu...E/CE-08-33.pdf

  27. #27
    fadec's Avatar
    Join Date
    Oct 2007
    Location
    Mooresville, NC
    Posts
    154
    Post Thanks / Like
    Quote Originally Posted by tripleoption
    Steve P.,
    If the manufacturer's instructions require adherence to SB's and the like, and the FAR's require adherence to the manufacturer's instructions, doesn't that make SB's and the like mandatory in a roundabout way? (referring to certified aircraft)
    Not to suggest anything unsafe by any means, but an experimental aircraft would not technically be affected by the SB's in question. Of course, explaining that to a wife might prove to be the bigger burden.

    Regarding the brush/coil inspection, SB 3-08, here's something from the boss on July 10th
    http://rgl.faa.gov/Regulatory_and_Gu...E/CE-08-33.pdf


    As you can see from the Boss' letter it states,

    The FAA recommends compliance with Unison Industries Service Bulletin SB3-08.......

  28. #28
    OldCuby's Avatar
    Join Date
    Nov 2004
    Location
    Harpers Ferry, WV
    Posts
    545
    Post Thanks / Like
    Hmmm... I replaced my left Slick mag 1.5 years ago and it falls under SB3-08. I have 158 hrs on it so I take it that I do NOT have to inspect it until it has 250 hrs. I had it retimed once last March as it was a little too advanced. So far it has equal drop compared to the much older right Slick mag. I guess at 250 hrs it would be nice to simply replace the brush with one that would terminate the SB since to inspecting it requires removing the mag I think.
    Have I read that right?
    Jim

  29. #29
    T.J.'s Avatar
    Join Date
    Apr 2002
    Location
    Alaska
    Posts
    3,211
    Post Thanks / Like
    Jim:
    Yep, you have to remove the mag and split the case to replace the brush. When you remove the mag , sell it to an enemy and buy a Bendix. As you can tell, I'm not impressed with Slick/Case tractor mags.

  30. #30

    Join Date
    Nov 2004
    Location
    Sulphur Springs, Texas
    Posts
    147
    Post Thanks / Like
    I inspected my right mag today. It looked great. At the time the mag was being broken open, I got a response call from Joe "X' (cant remember last name) at Unison. He was really helpful and took his time explaining the ins and outs of the SB from Unison's standpoint. For example, my serial numbers which began with 0608XXXX were on the fringe of being problematic. Later numbers had a bigger chance of being problems. He felt like if the mags had run to 40 hours without problems and I got no signs of problems at mag check, then I probably didn't have a concern. He had a lot of other comments such as, a very, very small percentage of mags had the problem and those occurred more often on 6 cylinder engines as someone previously noted.

    He was so reassuring in my specific case and serial number that I didn't even pull the other mag ( would have been harder that the right one).

    He thinks you would get a warning at mag check if there was a problem. Suggested doing a mag check after landing to not have to confront a fix just before the next trip. Said as long as 150 drop max and 50 between all with not roughness, then all should be OK.

    He said he would be doing a seminar at 9:00AM on Tues at Oshkosh should anyone want to attend.
    Gene Herzog
    Texas Smith Cub Builder

  31. #31
    Steve Pierce's Avatar
    Join Date
    Mar 2002
    Location
    Graham, TX
    Posts
    18,649
    Post Thanks / Like
    Gene, Did you have more than 4 degree retarded timing when you checked it? just wondering why you took the mag apart?

    I have always had good service out of Bendix mags. The impulse coupling AD was a pain but luckily it got rescinded. I understand TCM has started a new mag program but I haven't been able to get pricing from any of the vendors listed on their web site. Hopefully they will make it cost effective.
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  32. #32
    OldCuby's Avatar
    Join Date
    Nov 2004
    Location
    Harpers Ferry, WV
    Posts
    545
    Post Thanks / Like
    Gene, thanks for that update. I'm with you as my mag in question serial no. also starts with 0608. I say why try to fix it if it ain't broke - yet!
    TJ - I think the mags are fitting since we drive Sky Tractors...
    Jim

  33. #33
    fadec's Avatar
    Join Date
    Oct 2007
    Location
    Mooresville, NC
    Posts
    154
    Post Thanks / Like
    I wouldn't get complacent with just checking one mag with a close s/n...we checked one today that, the left one was worn and the right one was perfect.

    Mags were installed new @ engine overhaul

  34. #34

    Join Date
    Nov 2004
    Location
    Sulphur Springs, Texas
    Posts
    147
    Post Thanks / Like
    Steve,

    Cam was not an issue due to serial number. Did check timing first however and it was right on.

    I thought wearing of the brush would not affect the timing. The brush wear is my only problem if I look at my serial number and the SB's.
    Gene Herzog
    Texas Smith Cub Builder

  35. #35
    Steve Pierce's Avatar
    Join Date
    Mar 2002
    Location
    Graham, TX
    Posts
    18,649
    Post Thanks / Like
    Kits are now available for terminating action to the two Service Bulletins.

    http://unisonpubs.com/docs/F-1100-SB3-08A.pdf

    http://unisonpubs.com/docs/F-1100-SB2-08A.pdf
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers

  36. #36

    Join Date
    Dec 2005
    Location
    Fairbanks, AK
    Posts
    278
    Post Thanks / Like
    Thanks, Steve, for the updated information!

    I have been doing the inspection without removing the magneto, just removing the distributor cap and the back half of the magneto. Takes about a half hour extra on Cub inspections. Is there a reason to remove the magneto?

    Thanks,

    Vickie

  37. #37
    Steve Pierce's Avatar
    Join Date
    Mar 2002
    Location
    Graham, TX
    Posts
    18,649
    Post Thanks / Like
    Update of one service bulletin to include more mags a new one as well.
    Attached Files Attached Files
    Steve Pierce

    Everybody is ignorant, only on different subjects.
    Will Rogers
    Thanks utb 44E, Jonnyo thanked for this post

Similar Threads

  1. slick magneto upgrade A-65
    By Ragdragger in forum Modifications
    Replies: 1
    Last Post: 10-20-2008, 06:31 PM
  2. New TCM Service Bulletin
    By Steve Pierce in forum Tips and Tricks
    Replies: 16
    Last Post: 04-23-2003, 04:23 PM

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •