|
-
POSTING RULES

-
Donate yearly (please).
-
Advertise in here!
-
Today's Posts
|
Insert Pics
|

02-18-2015, 04:55 PM
|
|
|
|
Join Date: Dec 2009
Location: Montreal
Posts: 1,456
|
|
Magnetic plugs are common in helicopters and jet engine oil systems are they not? A false sense of security? Leading to disaster? Seriously? I can't see a downside personally.
__________________
Scott Black
Old school simple VFR RV 4, O-320, wood prop, MGL iEfis Lite
VAF dues 2020
Instagram @sblack2154
|

02-19-2015, 07:58 AM
|
 |
|
|
Join Date: Jan 2007
Location: Battleground
Posts: 4,348
|
|
Quote:
Originally Posted by sblack
Magnetic plugs are common in helicopters and jet engine oil systems are they not? A false sense of security? Leading to disaster? Seriously? I can't see a downside personally.
|
Don't want to derail the thread. If folks want to discuss the merits or lack of, probably should open a new thread. If you want a device that will alert you to an impending issue, put in a proper chip detector.
__________________
Smart People do Stupid things all the time. I know, I've seen me do'em.
RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.
|

02-20-2015, 11:04 AM
|
 |
|
|
Join Date: Feb 2005
Location: 20km outside of Zurich, Switzerland
Posts: 468
|
|
Found it!
YES! Due to all of your comments and inputs, he pulled the mags and found where the missing part belongs to:
He also showed it to an A&P, he has never seen that a cotterpin broke off like this!?
He will replace both cotter pins ... just to be sure.
I think we could catch it in time and react fine to not end up with a bigger damage. Thank you all!
__________________
Dominik
RV-7A, TMX-IO-320, FM-150, Sensenich FP
Flying since 28. April 2016
|

02-20-2015, 11:39 AM
|
 |
|
|
Join Date: Jan 2007
Location: Battleground
Posts: 4,348
|
|
Excellent! That is how maintenance is supposed to work. Many people don't even know to check that screen.
This break looks eerily like the one that broke on me. Just goes to show that a simple thing like a cotter pin can be manufactured with a defect, assuming that is why it broke. I think that is a pretty good assumption though.
Again, good catch and kudo's to all the sleuths that guessed correctly on where it came from.
__________________
Smart People do Stupid things all the time. I know, I've seen me do'em.
RV6 - Builder/Flying
Bucker Jungmann
Fiat G.46 -(restoration in progress, if I have enough life left in me)
RV1 - Proud Pilot.
|

02-20-2015, 12:59 PM
|
 |
|
|
Join Date: Sep 2010
Location: Redlands, Ca.
Posts: 1,458
|
|
Quote:
Originally Posted by swisseagle
YES! Due to all of your comments and inputs, he pulled the mags and found where the missing part belongs to:
He also showed it to an A&P, he has never seen that a cotterpin broke off like this!?
He will replace both cotter pins ... just to be sure.
I think we could catch it in time and react fine to not end up with a bigger damage. Thank you all!
|
Wow! That makes you want to look at your own. This had the potential of falling into the accessory case gears and spelling disaster for your engine. The piece doesn't show any signs of that so looks like all is well. Good Find, Allan.. 
__________________
Allan Nimmo
AntiSplatAero.com
Innovative Aircraft Safety
Products, Tools & ServicesInfo@AntiSplatAero.com Southern California (KREI)
RV-9A / Edge-540 
(909) 824-1020
|

02-20-2015, 06:46 PM
|
|
|
|
Join Date: Sep 2007
Location: Central IL
Posts: 5,516
|
|
Quote:
Originally Posted by swisseagle
YES! Due to all of your comments and inputs, he pulled the mags and found where the missing part belongs to:
He also showed it to an A&P, he has never seen that a cotterpin broke off like this!?
He will replace both cotter pins ... just to be sure.
I think we could catch it in time and react fine to not end up with a bigger damage. Thank you all!
|
Great Find - It is always luck that FOD does not get caught in something. The systems worked this time and it was an accessible component too. I will be checking my screen regularly!
Thanks!!
__________________
Bill
RV-7
Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
|

02-20-2015, 08:00 PM
|
 |
|
|
Join Date: Jan 2005
Location: SC
Posts: 12,887
|
|
This is a good example of why you should remove your ignitions at every condition inspection, regardless if they are mags, P-mags, or whatever.
__________________
Bill R.
RV-9 (Yes, it's a dragon tail)
O-360 w/ dual P-mags
Build the plane you want, not the plane others want you to build!
SC86 - Easley, SC
www.repucci.com/bill/baf.html
|

02-21-2015, 08:35 AM
|
 |
|
|
Join Date: Jan 2005
Location: 57AZ - NW Tucson area
Posts: 10,011
|
|
I don't know if it's a different material from the "standard" aircraft parts, but Slick has their own part number (not a MS number) for that cotter pin -
SLICK M2556 COTTER PIN
http://www.aircraftspruce.com/catalo...00svcparts.php
__________________
Gil Alexander
EAA Technical Counselor, Airframe Mechanic
Half completed RV-10 QB purchased
RV-6A N61GX - finally flying
Grumman Tiger N12GA - flying
La Cholla Airpark (57AZ) Tucson AZ
|

02-21-2015, 09:05 AM
|
 |
|
|
Join Date: Oct 2008
Location: Lake Country, B.C. Canada
Posts: 2,416
|
|
part numbers and true differences?
This reminds me of a friend handing me some 'real Piper' cotter pins to use on my main axle nuts. they were real pretty gold anodized ones, and looked like they might even be worth the $5 list price!
....but most of us buy the 'case of 1000 assorted cotter pins' and use whatever fits our needed application.
This makes me think twice about that practice!
....are 'real' cotters a softer alloy or higher strength than the dime store ones?
__________________
Perry Y.
RV-9a - SOLD!....
Lake Country, BC
|

02-21-2015, 09:52 AM
|
|
|
|
Join Date: Apr 2008
Location: Lake Havasu City AZ
Posts: 2,393
|
|
Cotter Pins
I have seen people use "water pump pliers" oriented to the ends of cotter pins to squeeze the cotter pins after installation. If this is done too aggressively it can leave tool marks on the cotter pin, which in turn could lead to failure. It would be of interest to examine the failed cotter pin under a magnifying glass to see if any tool marks can be seen.
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -6. The time now is 05:59 AM.
|