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civengpe

Joined: 14 Feb 2011
Posts: 105

Posted: Tue Aug 16, 2016 4:27 pm Post subject: MT Governor failure

You are right under me on the SB list. I feel EXTREMELY lucky nothing has happened in my 135 hours of flight. I am really at a loss as to how to proceed here. MT has my governor for the SB, but I wonder if I shouldn't just bite the bullet and go to a different brand.  

Is there a better mouse trap out there?  I'm not sure if it matters, but I have an MT 12B prop.  

Thanks,

 Shannon 

On Aug 16, 2016 7:16 PM, "Sandra & Rick" <jrlark(at)bmts.com (jrlark(at)bmts.com)> wrote: 	  Quote: 	
		  Hi all, so here is the rest of my storey.

 

 All in all not too impressive. This happened on April 27, 2016, during my

 very first flight.  Engine over speed to 3060 rpm, which heated the

 crankshaft thrust surface and caused multiple heat checks.  Unfortunately I

 didn't respond as quickly as I could have so the crank was destroyed (first

 flight, just coming off the runway, not expecting this etc).  Engine was

 torn apart, none destructive tested and crank shaft was replaced.

 

      Here are a few picture of what my governor looked like internally.

 #2083 shows the bushing that was seized,  #2084 shows some of the gouging,

 #2089 shows the make, serial # etc, #2092  shows where the bushing should

 have been, there were sharp ridges etc from the bushing rotating in the

 housing,   #2095 show one side of the area where the gears were located,

 #2096  shows the same area, opposite side, as does #2098, #2082 shows the

 house where the drive shaft passed through to the engine drive and where the

 bushing used to be located.

 

 Rick

 Southampton, Ont

 Vans # 40956

philperry9

Joined: 23 Nov 2011
Posts: 380

Posted: Tue Aug 16, 2016 4:40 pm Post subject: MT Governor failure

I'm curious as to whether Rick's failure is related to the failures of Myron and Todd.   It seems to me that Rick's failure is directly related to the published SB (Matching SN and bearing issue).   Myron and Todd's both has SN's outside the SB and experienced broken metal as opposed to a rotating bushing.



It seems to me like Ricks failure, while very significant, expensive, noteworthy, and concerning, is unrelated to the recent failures....

Am I right?



Phil

On Tue, Aug 16, 2016 at 7:26 PM, Shannon Hicks <civeng123(at)gmail.com (civeng123(at)gmail.com)> wrote:

 	  Quote: 	
		  

You are right under me on the SB list. I feel EXTREMELY lucky nothing has happened in my 135 hours of flight. I am really at a loss as to how to proceed here. MT has my governor for the SB, but I wonder if I shouldn't just bite the bullet and go to a different brand.  

Is there a better mouse trap out there?  I'm not sure if it matters, but I have an MT 12B prop.  

Thanks,

 Shannon 

On Aug 16, 2016 7:16 PM, "Sandra & Rick" <jrlark(at)bmts.com (jrlark(at)bmts.com)> wrote: 	  Quote: 	
		  Hi all, so here is the rest of my storey.

 

 All in all not too impressive. This happened on April 27, 2016, during my

 very first flight.  Engine over speed to 3060 rpm, which heated the

 crankshaft thrust surface and caused multiple heat checks.  Unfortunately I

 didn't respond as quickly as I could have so the crank was destroyed (first

 flight, just coming off the runway, not expecting this etc).  Engine was

 torn apart, none destructive tested and crank shaft was replaced.

 

      Here are a few picture of what my governor looked like internally.

 #2083 shows the bushing that was seized,  #2084 shows some of the gouging,

 #2089 shows the make, serial # etc, #2092  shows where the bushing should

 have been, there were sharp ridges etc from the bushing rotating in the

 housing,   #2095 show one side of the area where the gears were located,

 #2096  shows the same area, opposite side, as does #2098, #2082 shows the

 house where the drive shaft passed through to the engine drive and where the

 bushing used to be located.

 

 Rick

 Southampton, Ont

 Vans # 40956

jrlark

Joined: 03 Jul 2009
Posts: 72

Posted: Tue Aug 16, 2016 4:55 pm Post subject: MT Governor failure

Phil you are correct, it is a different failure.  The one fact I wonder about is whether Myron and Todd failures somehow started with the bushing?  Does anyone know?  

 

Unfortunately I can’t figure out how to post any pictures on Matronics.  Anyone know how?

Rick

 

From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of Phillip Perry

Sent: Tuesday, August 16, 2016 8:40 PM

To: rv10-list(at)matronics.com

Subject: Re: FW: MT Governor failure



 

I'm curious as to whether Rick's failure is related to the failures of Myron and Todd.   It seems to me that Rick's failure is directly related to the published SB (Matching SN and bearing issue).   Myron and Todd's both has SN's outside the SB and experienced broken metal as opposed to a rotating bushing.

 



It seems to me like Ricks failure, while very significant, expensive, noteworthy, and concerning, is unrelated to the recent failures....



 



Am I right?



Phil

 

On Tue, Aug 16, 2016 at 7:26 PM, Shannon Hicks <civeng123(at)gmail.com (civeng123(at)gmail.com)> wrote:

You are right under me on the SB list. I feel EXTREMELY lucky nothing has happened in my 135 hours of flight. I am really at a loss as to how to proceed here. MT has my governor for the SB, but I wonder if I shouldn't just bite the bullet and go to a different brand. 

Is there a better mouse trap out there?  I'm not sure if it matters, but I have an MT 12B prop. 

Thanks,

Shannon

 

On Aug 16, 2016 7:16 PM, "Sandra & Rick" <jrlark(at)bmts.com (jrlark(at)bmts.com)> wrote:

Hi all, so here is the rest of my storey.



All in all not too impressive. This happened on April 27, 2016, during my

very first flight.  Engine over speed to 3060 rpm, which heated the

crankshaft thrust surface and caused multiple heat checks.  Unfortunately I

didn't respond as quickly as I could have so the crank was destroyed (first

flight, just coming off the runway, not expecting this etc).  Engine was

torn apart, none destructive tested and crank shaft was replaced.



     Here are a few picture of what my governor looked like internally.

#2083 shows the bushing that was seized,  #2084 shows some of the gouging,

#2089 shows the make, serial # etc, #2092  shows where the bushing should

have been, there were sharp ridges etc from the bushing rotating in the

housing,   #2095 show one side of the area where the gears were located,

#2096  shows the same area, opposite side, as does #2098, #2082 shows the

house where the drive shaft passed through to the engine drive and where the

bushing used to be located.



Rick

Southampton, Ont

Vans # 40956

Tim Olson

Joined: 25 Jan 2007
Posts: 2871

Posted: Tue Aug 16, 2016 5:04 pm Post subject: MT Governor failure

I'm thinking that most of them were delivered around the same timeframe and they are probably just differing failures but still related to some issue that came around that timeframe.  I bet the SB serial number range is insufficient.

Because there are so many MT governors flying since 2005 that we would hear of more if there were a large number of failures.  That said, if your governor was from 2011 thru 2013, I'd be concerned even if your governor isn't within the S/N range.

Tim



On Aug 16, 2016, at 7:39 PM, Phillip Perry <philperry9(at)gmail.com (philperry9(at)gmail.com)> wrote:

 	  Quote: 	
		  I'm curious as to whether Rick's failure is related to the failures of Myron and Todd.   It seems to me that Rick's failure is directly related to the published SB (Matching SN and bearing issue).   Myron and Todd's both has SN's outside the SB and experienced broken metal as opposed to a rotating bushing.



It seems to me like Ricks failure, while very significant, expensive, noteworthy, and concerning, is unrelated to the recent failures....

Am I right?



Phil

On Tue, Aug 16, 2016 at 7:26 PM, Shannon Hicks <civeng123(at)gmail.com (civeng123(at)gmail.com)> wrote:

 	  Quote: 	
		  

You are right under me on the SB list. I feel EXTREMELY lucky nothing has happened in my 135 hours of flight. I am really at a loss as to how to proceed here. MT has my governor for the SB, but I wonder if I shouldn't just bite the bullet and go to a different brand.  

Is there a better mouse trap out there?  I'm not sure if it matters, but I have an MT 12B prop.  

Thanks,

 Shannon 

On Aug 16, 2016 7:16 PM, "Sandra & Rick" <jrlark(at)bmts.com (jrlark(at)bmts.com)> wrote: 	  Quote: 	
		  Hi all, so here is the rest of my storey.

 

 All in all not too impressive. This happened on April 27, 2016, during my

 very first flight.  Engine over speed to 3060 rpm, which heated the

 crankshaft thrust surface and caused multiple heat checks.  Unfortunately I

 didn't respond as quickly as I could have so the crank was destroyed (first

 flight, just coming off the runway, not expecting this etc).  Engine was

 torn apart, none destructive tested and crank shaft was replaced.

 

      Here are a few picture of what my governor looked like internally.

 #2083 shows the bushing that was seized,  #2084 shows some of the gouging,

 #2089 shows the make, serial # etc, #2092  shows where the bushing should

 have been, there were sharp ridges etc from the bushing rotating in the

 housing,   #2095 show one side of the area where the gears were located,

 #2096  shows the same area, opposite side, as does #2098, #2082 shows the

 house where the drive shaft passed through to the engine drive and where the

 bushing used to be located.

 

 Rick

 Southampton, Ont

 Vans # 40956

jeff(at)westcottpress.com
Guest

Posted: Tue Aug 16, 2016 5:45 pm Post subject: MT Governor failure

For those looking for an alternative governor, here is what I am using with my YIO-540-D4A5 and Hartzell Blended Airfoil. This was recommended to me by Gary Sobek.

PCU5000.COM

I purchased through:

Ameritech Industries dba American Propeller Service

Repair Station No. NO3R717L

20208 Charlanne Drive

Redding, CA 96002

Phone: (530) 221 4470

Fax: (530) 221 5210

Email: sales(at)ameritech-aviation.com (sales(at)ameritech-aviation.com)



Jeff Carpenter

N410CF

Flying



On Aug 16, 2016, at 6:03 PM, Tim Olson wrote:

 	  Quote: 	
		  

I'm thinking that most of them were delivered around the same timeframe and they are probably just differing failures but still related to some issue that came around that timeframe.  I bet the SB serial number range is insufficient.

Because there are so many MT governors flying since 2005 that we would hear of more if there were a large number of failures.  That said, if your governor was from 2011 thru 2013, I'd be concerned even if your governor isn't within the S/N range.

Tim



On Aug 16, 2016, at 7:39 PM, Phillip Perry <philperry9(at)gmail.com (philperry9(at)gmail.com)> wrote:

 	  Quote: 	
		  I'm curious as to whether Rick's failure is related to the failures of Myron and Todd.   It seems to me that Rick's failure is directly related to the published SB (Matching SN and bearing issue).   Myron and Todd's both has SN's outside the SB and experienced broken metal as opposed to a rotating bushing.



It seems to me like Ricks failure, while very significant, expensive, noteworthy, and concerning, is unrelated to the recent failures....

Am I right?



Phil

On Tue, Aug 16, 2016 at 7:26 PM, Shannon Hicks <civeng123(at)gmail.com (civeng123(at)gmail.com)> wrote:

 	  Quote: 	
		  

You are right under me on the SB list. I feel EXTREMELY lucky nothing has happened in my 135 hours of flight. I am really at a loss as to how to proceed here. MT has my governor for the SB, but I wonder if I shouldn't just bite the bullet and go to a different brand. 

Is there a better mouse trap out there?  I'm not sure if it matters, but I have an MT 12B prop. 

Thanks,

 Shannon 

On Aug 16, 2016 7:16 PM, "Sandra & Rick" <jrlark(at)bmts.com (jrlark(at)bmts.com)> wrote: 	  Quote: 	
		  Hi all, so here is the rest of my storey.

 

 All in all not too impressive. This happened on April 27, 2016, during my

 very first flight.  Engine over speed to 3060 rpm, which heated the

 crankshaft thrust surface and caused multiple heat checks.  Unfortunately I

 didn't respond as quickly as I could have so the crank was destroyed (first

 flight, just coming off the runway, not expecting this etc).  Engine was

 torn apart, none destructive tested and crank shaft was replaced.

 

      Here are a few picture of what my governor looked like internally.

 #2083 shows the bushing that was seized,  #2084 shows some of the gouging,

 #2089 shows the make, serial # etc, #2092  shows where the bushing should

 have been, there were sharp ridges etc from the bushing rotating in the

 housing,   #2095 show one side of the area where the gears were located,

 #2096  shows the same area, opposite side, as does #2098, #2082 shows the

 house where the drive shaft passed through to the engine drive and where the

 bushing used to be located.

 

 Rick

 Southampton, Ont

 Vans # 40956

 	




 



	


 

	


	




 Westcott Press

1121 Isabel Street

Burbank, CA 91506

jeff(at)westcottpress.com (jeff(at)westcottpress.com)

818-861-7300

Kellym

Joined: 10 Jan 2006
Posts: 1700
Location: Sun Lakes AZ

Posted: Tue Aug 16, 2016 6:04 pm Post subject: MT Governor failure

Well, I have pretty much the same governor and prop. My governor is a 

-5, which came direct from MT in Germany, but that may or may not be a 

difference. I have the same MT 3 blade prop Vans sells.

I made some minor modifications to my flight today with these issues in 

mind...to minimize time over water, away from roads or civilization, but 

mad 4.5 hour flight to get myself and plane home. Where to go from here 

will depend a lot on the reports. No one wants to do a teardown, or have 

a lot of expenses not covered by insurance. Nor do we want to have 

hangar queens awaiting a solution.

I have to look up the service bulletin and see if my governor falls in 

that range. Has anyone posted the service bulletin?



On 8/16/2016 5:26 PM, Shannon Hicks wrote:

 	  Quote: 	
		   You are right under me on the SB list. I feel EXTREMELY lucky nothing

 has happened in my 135 hours of flight. I am really at a loss as to how

 to proceed here. MT has my governor for the SB, but I wonder if I

 shouldn't just bite the bullet and go to a different brand.



 Is there a better mouse trap out there?  I'm not sure if it matters, but

 I have an MT 12B prop.



 Thanks,

 Shannon

 On Aug 16, 2016 7:16 PM, "Sandra & Rick" <jrlark(at)bmts.com

 <mailto:jrlark(at)bmts.com>> wrote:



     Hi all, so here is the rest of my storey.



     All in all not too impressive. This happened on April 27, 2016,

     during my

     very first flight.  Engine over speed to 3060 rpm, which heated the

     crankshaft thrust surface and caused multiple heat checks.

     Unfortunately I

     didn't respond as quickly as I could have so the crank was destroyed

     (first

     flight, just coming off the runway, not expecting this etc).  Engine was

     torn apart, none destructive tested and crank shaft was replaced.



          Here are a few picture of what my governor looked like internally.

     #2083 shows the bushing that was seized,  #2084 shows some of the

     gouging,

     #2089 shows the make, serial # etc, #2092  shows where the bushing

     should

     have been, there were sharp ridges etc from the bushing rotating in the

     housing,   #2095 show one side of the area where the gears were located,

     #2096  shows the same area, opposite side, as does #2098, #2082

     shows the

     house where the drive shaft passed through to the engine drive and

     where the

     bushing used to be located.



     Rick

     Southampton, Ont

     Vans # 40956

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

philperry9

Joined: 23 Nov 2011
Posts: 380

Posted: Tue Aug 16, 2016 6:17 pm Post subject: MT Governor failure

Here's the link to all the SB's Kelly...  The SB that's been discussed here is #27.



http://www.mt-propeller.com/en/entw/serviced.htm



Phil

On Tue, Aug 16, 2016 at 9:04 PM, Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)> wrote:

 	  Quote: 	
		  --> RV10-List message posted by: Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)>

 

 Well, I have pretty much the same governor and prop. My governor is a -5, which came direct from MT in Germany, but that may or may not be a difference. I have the same MT 3 blade prop Vans sells.

 I made some minor modifications to my flight today with these issues in mind...to minimize time over water, away from roads or civilization, but mad 4.5 hour flight to get myself and plane home. Where to go from here will depend a lot on the reports. No one wants to do a teardown, or have a lot of expenses not covered by insurance. Nor do we want to have hangar queens awaiting a solution.

 I have to look up the service bulletin and see if my governor falls in that range. Has anyone posted the service bulletin?

 

 On 8/16/2016 5:26 PM, Shannon Hicks wrote:

  	  Quote: 	
		   You are right under me on the SB list. I feel EXTREMELY lucky nothing

 has happened in my 135 hours of flight. I am really at a loss as to how

 to proceed here. MT has my governor for the SB, but I wonder if I

 shouldn't just bite the bullet and go to a different brand.

 

 Is there a better mouse trap out there?  I'm not sure if it matters, but

 I have an MT 12B prop.

 

 Thanks,

 Shannon

 

 

 On Aug 16, 2016 7:16 PM, "Sandra & Rick" <jrlark(at)bmts.com (jrlark(at)bmts.com)

 <mailto:jrlark(at)bmts.com (jrlark(at)bmts.com)>> wrote:

 

     Hi all, so here is the rest of my storey.

 

     All in all not too impressive. This happened on April 27, 2016,

     during my

     very first flight.  Engine over speed to 3060 rpm, which heated the

     crankshaft thrust surface and caused multiple heat checks.

     Unfortunately I

     didn't respond as quickly as I could have so the crank was destroyed

     (first

     flight, just coming off the runway, not expecting this etc).  Engine was

     torn apart, none destructive tested and crank shaft was replaced.

 

          Here are a few picture of what my governor looked like internally.

     #2083 shows the bushing that was seized,  #2084 shows some of the

     gouging,

     #2089 shows the make, serial # etc, #2092  shows where the bushing

     should

     have been, there were sharp ridges etc from the bushing rotating in the

     housing,   #2095 show one side of the area where the gears were located,

     #2096  shows the same area, opposite side, as does #2098, #2082

     shows the

     house where the drive shaft passed through to the engine drive and

     where the

     bushing used to be located.

 

     Rick

     Southampton, Ont

     Vans # 40956

 

 



	
 

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Kellym

Joined: 10 Jan 2006
Posts: 1700
Location: Sun Lakes AZ

Posted: Tue Aug 16, 2016 6:20 pm Post subject: MT Governor failure

Thanks Phil. I sure thought you would be flying before I first got into 

the air.



On 8/16/2016 7:15 PM, Phillip Perry wrote:

 	  Quote: 	
		   Here's the link to all the SB's Kelly...  The SB that's been discussed

 here is #27.



 http://www.mt-propeller.com/en/entw/serviced.htm



 Phil



 On Tue, Aug 16, 2016 at 9:04 PM, Kelly McMullen <kellym(at)aviating.com

 <mailto:kellym(at)aviating.com>> wrote:



     

     <mailto:kellym(at)aviating.com>>



     Well, I have pretty much the same governor and prop. My governor is

     a -5, which came direct from MT in Germany, but that may or may not

     be a difference. I have the same MT 3 blade prop Vans sells.

     I made some minor modifications to my flight today with these issues

     in mind...to minimize time over water, away from roads or

     civilization, but mad 4.5 hour flight to get myself and plane home.

     Where to go from here will depend a lot on the reports. No one wants

     to do a teardown, or have a lot of expenses not covered by

     insurance. Nor do we want to have hangar queens awaiting a solution.

     I have to look up the service bulletin and see if my governor falls

     in that range. Has anyone posted the service bulletin?



     On 8/16/2016 5:26 PM, Shannon Hicks wrote:



         You are right under me on the SB list. I feel EXTREMELY lucky

         nothing

         has happened in my 135 hours of flight. I am really at a loss as

         to how

         to proceed here. MT has my governor for the SB, but I wonder if I

         shouldn't just bite the bullet and go to a different brand.



         Is there a better mouse trap out there?  I'm not sure if it

         matters, but

         I have an MT 12B prop.



         Thanks,

         Shannon

         On Aug 16, 2016 7:16 PM, "Sandra & Rick" <jrlark(at)bmts.com

         <mailto:jrlark(at)bmts.com>

         <mailto:jrlark(at)bmts.com <mailto:jrlark(at)bmts.com>>> wrote:



             Hi all, so here is the rest of my storey.



             All in all not too impressive. This happened on April 27, 2016,

             during my

             very first flight.  Engine over speed to 3060 rpm, which

         heated the

             crankshaft thrust surface and caused multiple heat checks.

             Unfortunately I

             didn't respond as quickly as I could have so the crank was

         destroyed

             (first

             flight, just coming off the runway, not expecting this

         etc).  Engine was

             torn apart, none destructive tested and crank shaft was

         replaced.



                  Here are a few picture of what my governor looked like

         internally.

             #2083 shows the bushing that was seized,  #2084 shows some

         of the

             gouging,

             #2089 shows the make, serial # etc, #2092  shows where the

         bushing

             should

             have been, there were sharp ridges etc from the bushing

         rotating in the

             housing,   #2095 show one side of the area where the gears

         were located,

             #2096  shows the same area, opposite side, as does #2098, #2082

             shows the

             house where the drive shaft passed through to the engine

         drive and

             where the

             bushing used to be located.



             Rick

             Southampton, Ont

             Vans # 40956

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     target="_blank">http://www.matronics.com/Navigator?RV10-List

     ====================================

     FORUMS -

     eferrer" target="_blank">http://forums.matronics.com

     ====================================

     WIKI -

     errer" target="_blank">http://wiki.matronics.com

     ====================================

     b Site -

               -Matt Dralle, List Admin.

     rel="noreferrer" target="_blank">http://www.matronics.com/contribution

     ====================================

_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

philperry9

Joined: 23 Nov 2011
Posts: 380

Posted: Tue Aug 16, 2016 6:35 pm Post subject: MT Governor failure

I was thinking we'd be up about the same time.



I got stuck communing 3.5 hours each way to work on the plane and I did it every single week for a year and a half.   That really slowed me down.   



Last December I finally got a hangar  in Waco and could finally move the plane up here with us.   Now it's just a 10 minute walk from the house to the airport.   



It's within striking distance to flying (I think). 



Sent from my iPhone



 	  Quote: 	
		   On Aug 16, 2016, at 9:20 PM, Kelly McMullen <kellym(at)aviating.com> wrote:

 

 

 

 Thanks Phil. I sure thought you would be flying before I first got into the air.

 

> On 8/16/2016 7:15 PM, Phillip Perry wrote:

> Here's the link to all the SB's Kelly...  The SB that's been discussed

> here is #27.

> 

> http://www.mt-propeller.com/en/entw/serviced.htm

> 

> Phil

> 

> On Tue, Aug 16, 2016 at 9:04 PM, Kelly McMullen <kellym(at)aviating.com

> <mailto:kellym(at)aviating.com>> wrote:

> 

>    

>    <mailto:kellym(at)aviating.com>>

> 

>    Well, I have pretty much the same governor and prop. My governor is

>    a -5, which came direct from MT in Germany, but that may or may not

>    be a difference. I have the same MT 3 blade prop Vans sells.

>    I made some minor modifications to my flight today with these issues

>    in mind...to minimize time over water, away from roads or

>    civilization, but mad 4.5 hour flight to get myself and plane home.

>    Where to go from here will depend a lot on the reports. No one wants

>    to do a teardown, or have a lot of expenses not covered by

>    insurance. Nor do we want to have hangar queens awaiting a solution.

>    I have to look up the service bulletin and see if my governor falls

>    in that range. Has anyone posted the service bulletin?

> 

>    On 8/16/2016 5:26 PM, Shannon Hicks wrote:

> 

>        You are right under me on the SB list. I feel EXTREMELY lucky

>        nothing

>        has happened in my 135 hours of flight. I am really at a loss as

>        to how

>        to proceed here. MT has my governor for the SB, but I wonder if I

>        shouldn't just bite the bullet and go to a different brand.

> 

>        Is there a better mouse trap out there?  I'm not sure if it

>        matters, but

>        I have an MT 12B prop.

> 

>        Thanks,

>        Shannon

> 

> 

>        On Aug 16, 2016 7:16 PM, "Sandra & Rick" <jrlark(at)bmts.com

>        <mailto:jrlark(at)bmts.com>

>        <mailto:jrlark(at)bmts.com <mailto:jrlark(at)bmts.com>>> wrote:

> 

>            Hi all, so here is the rest of my storey.

> 

>            All in all not too impressive. This happened on April 27, 2016,

>            during my

>            very first flight.  Engine over speed to 3060 rpm, which

>        heated the

>            crankshaft thrust surface and caused multiple heat checks.

>            Unfortunately I

>            didn't respond as quickly as I could have so the crank was

>        destroyed

>            (first

>            flight, just coming off the runway, not expecting this

>        etc).  Engine was

>            torn apart, none destructive tested and crank shaft was

>        replaced.

> 

>                 Here are a few picture of what my governor looked like

>        internally.

>            #2083 shows the bushing that was seized,  #2084 shows some

>        of the

>            gouging,

>            #2089 shows the make, serial # etc, #2092  shows where the

>        bushing

>            should

>            have been, there were sharp ridges etc from the bushing

>        rotating in the

>            housing,   #2095 show one side of the area where the gears

>        were located,

>            #2096  shows the same area, opposite side, as does #2098, #2082

>            shows the

>            house where the drive shaft passed through to the engine

>        drive and

>            where the

>            bushing used to be located.

> 

>            Rick

>            Southampton, Ont

>            Vans # 40956

> 

> 

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glastar(at)gmx.net
Guest

Posted: Tue Aug 16, 2016 10:33 pm Post subject: MT Governor failure

I had just this morning an email feedback from MT Germany, they are 

working on a new SB which should cover the impacted serial numbers so 

they now seem to be aware of what is causing this issue?



Werner



On 17.08.2016 03:03, Tim Olson wrote:

 	  Quote: 	
		   I'm thinking that most of them were delivered around the same timeframe

 and they are probably just differing failures but still related to some

 issue that came around that timeframe.  I bet the SB serial number range

 is insufficient.

 Because there are so many MT governors flying since 2005 that we would

 hear of more if there were a large number of failures.  That said, if

 your governor was from 2011 thru 2013, I'd be concerned even if your

 governor isn't within the S/N range.

 Tim



 On Aug 16, 2016, at 7:39 PM, Phillip Perry <philperry9(at)gmail.com

 <mailto:philperry9(at)gmail.com>> wrote:



> I'm curious as to whether Rick's failure is related to the failures of

> Myron and Todd.   It seems to me that Rick's failure is directly

> related to the published SB (Matching SN and bearing issue).   Myron

> and Todd's both has SN's outside the SB and experienced broken metal

> as opposed to a rotating bushing.

>

> It seems to me like Ricks failure, while very significant, expensive,

> noteworthy, and concerning, is unrelated to the recent failures....

>

> Am I right?

>

> Phil

>

> On Tue, Aug 16, 2016 at 7:26 PM, Shannon Hicks <civeng123(at)gmail.com

> <mailto:civeng123(at)gmail.com>> wrote:

>

>     You are right under me on the SB list. I feel EXTREMELY lucky

>     nothing has happened in my 135 hours of flight. I am really at a

>     loss as to how to proceed here. MT has my governor for the SB, but

>     I wonder if I shouldn't just bite the bullet and go to a different

>     brand.

>

>     Is there a better mouse trap out there?  I'm not sure if it

>     matters, but I have an MT 12B prop.

>

>     Thanks,

>     Shannon

>     On Aug 16, 2016 7:16 PM, "Sandra & Rick" <jrlark(at)bmts.com

>     <mailto:jrlark(at)bmts.com>> wrote:

>

>         Hi all, so here is the rest of my story.

>

>         All in all not too impressive. This happened on April 27,

>         2016, during my

>         very first flight.  Engine over speed to 3060 rpm, which

>         heated the

>         crankshaft thrust surface and caused multiple heat checks.

>         Unfortunately I

>         didn't respond as quickly as I could have so the crank was

>         destroyed (first

>         flight, just coming off the runway, not expecting this etc).

>         Engine was

>         torn apart, none destructive tested and crank shaft was replaced.

>

>              Here are a few picture of what my governor looked like

>         internally.

>         #2083 shows the bushing that was seized,  #2084 shows some of

>         the gouging,

>         #2089 shows the make, serial # etc, #2092  shows where the

>         bushing should

>         have been, there were sharp ridges etc from the bushing

>         rotating in the

>         housing,   #2095 show one side of the area where the gears

>         were located,

>         #2096  shows the same area, opposite side, as does #2098,

>         #2082 shows the

>         house where the drive shaft passed through to the engine drive

>         and where the

>         bushing used to be located.

>

>         Rick

>         Southampton, Ont

>         Vans # 40956

glastar(at)gmx.net
Guest

Posted: Thu Aug 18, 2016 6:21 am Post subject: MT Governor failure

I got this morning a feedback from MT, that my Governor with



S/N 10G598G



is impacted and that I should send it to the factory to be fixed (this 

is manufactured in 2010



Werner



On 17.08.2016 08:32, Werner Schneider wrote:

 	  Quote: 	
		   I had just this morning an email feedback from MT Germany, they are 

 working on a new SB which should cover the impacted serial numbers so 

 they now seem to be aware of what is causing this issue?



 Werner



 On 17.08.2016 03:03, Tim Olson wrote:

> I'm thinking that most of them were delivered around the same timeframe

> and they are probably just differing failures but still related to some

> issue that came around that timeframe.  I bet the SB serial number range

> is insufficient.

> Because there are so many MT governors flying since 2005 that we would

> hear of more if there were a large number of failures.  That said, if

> your governor was from 2011 thru 2013, I'd be concerned even if your

> governor isn't within the S/N range.

> Tim

>

Tim Olson

Joined: 25 Jan 2007
Posts: 2871

Posted: Thu Aug 18, 2016 6:29 am Post subject: MT Governor failure

Thanks Werner,



If you are talking to someone there, see if you can get a feeling for

what the EARLIEST date a governor would have if it were affected.

I'm betting that we'll find it's somewhere after 2009 or 2010,

but I'll be more comfortable if I heard what they had to say.

Tim

On 8/18/2016 9:20 AM, Werner Schneider wrote:

 	  Quote: 	
		   



 I got this morning a feedback from MT, that my Governor with



 S/N 10G598G



 is impacted and that I should send it to the factory to be fixed (this

 is manufactured in 2010



 Werner



 On 17.08.2016 08:32, Werner Schneider wrote:

> I had just this morning an email feedback from MT Germany, they are

> working on a new SB which should cover the impacted serial numbers so

> they now seem to be aware of what is causing this issue?

>

> Werner

>

> On 17.08.2016 03:03, Tim Olson wrote:

>> I'm thinking that most of them were delivered around the same timeframe

>> and they are probably just differing failures but still related to some

>> issue that came around that timeframe.  I bet the SB serial number range

>> is insufficient.

>> Because there are so many MT governors flying since 2005 that we would

>> hear of more if there were a large number of failures.  That said, if

>> your governor was from 2011 thru 2013, I'd be concerned even if your

>> governor isn't within the S/N range.

>> Tim

>>

civengpe

Joined: 14 Feb 2011
Posts: 105

Posted: Thu Aug 18, 2016 6:29 am Post subject: MT Governor failure

Werner,What engine do you have?  

I have an Aerosport Power IO-540 with 9.2:1 pistons and MT is telling me that mine is impacted as well.  From talking with MT in Florida, the engine is what is driving the modification requirements.  Ie Barret, Aerosport etc....

Is this what others are hearing as well?

Shannon Hicks

On Thu, Aug 18, 2016 at 9:20 AM, Werner Schneider <glastar(at)gmx.net (glastar(at)gmx.net)> wrote:

 	  Quote: 	
		  --> RV10-List message posted by: Werner Schneider <glastar(at)gmx.net (glastar(at)gmx.net)>

 

 I got this morning a feedback from MT, that my Governor with

 

 S/N 10G598G

 

 is impacted and that I should send it to the factory to be fixed (this is manufactured in 2010

 

 Werner

 

 On 17.08.2016 08:32, Werner Schneider wrote:

  	  Quote: 	
		   I had just this morning an email feedback from MT Germany, they are working on a new SB which should cover the impacted serial numbers so they now seem to be aware of what is causing this issue?

 

 Werner

 

 On 17.08.2016 03:03, Tim Olson wrote:

  	  Quote: 	
		   I'm thinking that most of them were delivered around the same timeframe

 and they are probably just differing failures but still related to some

 issue that came around that timeframe.  I bet the SB serial number range

 is insufficient.

 Because there are so many MT governors flying since 2005 that we would

 hear of more if there were a large number of failures.  That said, if

 your governor was from 2011 thru 2013, I'd be concerned even if your

 governor isn't within the S/N range.

 Tim

 

 	
	
 

 

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philperry9

Joined: 23 Nov 2011
Posts: 380

Posted: Thu Aug 18, 2016 6:33 am Post subject: MT Governor failure

Did they tell you what the fix is and how their modification differs from the standard/defective batch?



Phil



Sent from my iPhone 



 	  Quote: 	
		   On Aug 18, 2016, at 9:20 AM, Werner Schneider <glastar(at)gmx.net> wrote:

 

 

 

 I got this morning a feedback from MT, that my Governor with

 

 S/N 10G598G

 

 is impacted and that I should send it to the factory to be fixed (this is manufactured in 2010

 

 Werner

 

> On 17.08.2016 08:32, Werner Schneider wrote:

> I had just this morning an email feedback from MT Germany, they are working on a new SB which should cover the impacted serial numbers so they now seem to be aware of what is causing this issue?

> 

> Werner

> 

>> On 17.08.2016 03:03, Tim Olson wrote:

>> I'm thinking that most of them were delivered around the same timeframe

>> and they are probably just differing failures but still related to some

>> issue that came around that timeframe.  I bet the SB serial number range

>> is insufficient.

>> Because there are so many MT governors flying since 2005 that we would

>> hear of more if there were a large number of failures.  That said, if

>> your governor was from 2011 thru 2013, I'd be concerned even if your

>> governor isn't within the S/N range.

>> Tim

Kellym

Joined: 10 Jan 2006
Posts: 1700
Location: Sun Lakes AZ

Posted: Thu Aug 18, 2016 6:41 am Post subject: MT Governor failure

I might see higher compression pistons affecting the prop via harmonics. 

I do not see what else about the engines would have anything to do with 

who put them together. For the most part, engines built by the reputable 

shops mentioned will have flow balanced cylinders, well balanced 

rotating parts and run smoother than a factory engine. I see nothing 

about that has anything to do with the governor. So far we are not 

getting any information beyond the service bulletin about where the 

problem might lie.



On 8/18/2016 7:29 AM, Shannon Hicks wrote:

 	  Quote: 	
		   Werner,

 What engine do you have?



 I have an Aerosport Power IO-540 with 9.2:1 pistons and MT is telling me

 that mine is impacted as well.  From talking with MT in Florida, the

 engine is what is driving the modification requirements.  Ie Barret,

 Aerosport etc....



 Is this what others are hearing as well?



 Shannon Hicks



 On Thu, Aug 18, 2016 at 9:20 AM, Werner Schneider <glastar(at)gmx.net

 <mailto:glastar(at)gmx.net>> wrote:



     

     <mailto:glastar(at)gmx.net>>



     I got this morning a feedback from MT, that my Governor with



     S/N 10G598G



     is impacted and that I should send it to the factory to be fixed

     (this is manufactured in 2010



     Werner



     On 17.08.2016 08:32, Werner Schneider wrote:



         I had just this morning an email feedback from MT Germany, they

         are working on a new SB which should cover the impacted serial

         numbers so they now seem to be aware of what is causing this issue?



         Werner



         On 17.08.2016 03:03, Tim Olson wrote:



             I'm thinking that most of them were delivered around the

             same timeframe

             and they are probably just differing failures but still

             related to some

             issue that came around that timeframe.  I bet the SB serial

             number range

             is insufficient.

             Because there are so many MT governors flying since 2005

             that we would

             hear of more if there were a large number of failures.  That

             said, if

             your governor was from 2011 thru 2013, I'd be concerned even

             if your

             governor isn't within the S/N range.

             Tim



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_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD

civengpe

Joined: 14 Feb 2011
Posts: 105

Posted: Thu Aug 18, 2016 6:53 am Post subject: MT Governor failure

Kelly,I'm just passing along what MT in Florida told me.  They have my governor in their shop and told me they have the parts on order from Germany to correct the issue.  Beyond that, I don't know what the specific issue was other than they said it only affects non certified IO-540s.

I really wish someone from MT would at least get out in front of this and post something.   

Shannon Hicks 

On Thu, Aug 18, 2016 at 9:42 AM, Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)> wrote:

 	  Quote: 	
		  --> RV10-List message posted by: Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)>

 

 I might see higher compression pistons affecting the prop via harmonics. I do not see what else about the engines would have anything to do with who put them together. For the most part, engines built by the reputable shops mentioned will have flow balanced cylinders, well balanced rotating parts and run smoother than a factory engine. I see nothing about that has anything to do with the governor. So far we are not getting any information beyond the service bulletin about where the problem might lie.

 

 On 8/18/2016 7:29 AM, Shannon Hicks wrote:

  	  Quote: 	
		   Werner,

 What engine do you have?

 

 I have an Aerosport Power IO-540 with 9.2:1 pistons and MT is telling me

 that mine is impacted as well.  From talking with MT in Florida, the

 engine is what is driving the modification requirements.  Ie Barret,

 Aerosport etc....

 

 Is this what others are hearing as well?

 

 Shannon Hicks

 

 On Thu, Aug 18, 2016 at 9:20 AM, Werner Schneider <glastar(at)gmx.net (glastar(at)gmx.net)

 <mailto:glastar(at)gmx.net (glastar(at)gmx.net)>> wrote:

 

     --> RV10-List message posted by: Werner Schneider <glastar(at)gmx.net (glastar(at)gmx.net)

     <mailto:glastar(at)gmx.net (glastar(at)gmx.net)>>

 

     I got this morning a feedback from MT, that my Governor with

 

     S/N 10G598G

 

     is impacted and that I should send it to the factory to be fixed

     (this is manufactured in 2010

 

     Werner

 

     On 17.08.2016 08:32, Werner Schneider wrote:

 

         I had just this morning an email feedback from MT Germany, they

         are working on a new SB which should cover the impacted serial

         numbers so they now seem to be aware of what is causing this issue?

 

         Werner

 

         On 17.08.2016 03:03, Tim Olson wrote:

 

             I'm thinking that most of them were delivered around the

             same timeframe

             and they are probably just differing failures but still

             related to some

             issue that came around that timeframe.  I bet the SB serial

             number range

             is insufficient.

             Because there are so many MT governors flying since 2005

             that we would

             hear of more if there were a large number of failures.  That

             said, if

             your governor was from 2011 thru 2013, I'd be concerned even

             if your

             governor isn't within the S/N range.

             Tim

 

 

 

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glastar(at)gmx.net
Guest

Posted: Thu Aug 18, 2016 7:02 am Post subject: MT Governor failure

They did ask the engine type and as I have two governors from them one 

on a O-320 and the 2nd for an IO-540 I got only feedback by email so far 

(still need to supply the O-320 serial which is at the airport).



They did not specific ask for the type details so I'm not sure it has an

influence.



I had so far only email contact but will try to get more details.



Cheers Werner



On 18.08.2016 16:42, Kelly McMullen wrote:

 	  Quote: 	
		   



 I might see higher compression pistons affecting the prop via harmonics.

 I do not see what else about the engines would have anything to do with

 who put them together. For the most part, engines built by the reputable

 shops mentioned will have flow balanced cylinders, well balanced

 rotating parts and run smoother than a factory engine. I see nothing

 about that has anything to do with the governor. So far we are not

 getting any information beyond the service bulletin about where the

 problem might lie.



 On 8/18/2016 7:29 AM, Shannon Hicks wrote:

> Werner,

> What engine do you have?

>

> I have an Aerosport Power IO-540 with 9.2:1 pistons and MT is telling me

> that mine is impacted as well.  From talking with MT in Florida, the

> engine is what is driving the modification requirements.  Ie Barret,

> Aerosport etc....

>

> Is this what others are hearing as well?

>

> Shannon Hicks

>

> On Thu, Aug 18, 2016 at 9:20 AM, Werner Schneider <glastar(at)gmx.net

> <mailto:glastar(at)gmx.net>> wrote:

>

>     

>     <mailto:glastar(at)gmx.net>>

>

>     I got this morning a feedback from MT, that my Governor with

>

>     S/N 10G598G

>

>     is impacted and that I should send it to the factory to be fixed

>     (this is manufactured in 2010

>

>     Werner

>

>     On 17.08.2016 08:32, Werner Schneider wrote:

>

>         I had just this morning an email feedback from MT Germany, they

>         are working on a new SB which should cover the impacted serial

>         numbers so they now seem to be aware of what is causing this

> issue?

>

>         Werner

>

>         On 17.08.2016 03:03, Tim Olson wrote:

>

>             I'm thinking that most of them were delivered around the

>             same timeframe

>             and they are probably just differing failures but still

>             related to some

>             issue that came around that timeframe.  I bet the SB serial

>             number range

>             is insufficient.

>             Because there are so many MT governors flying since 2005

>             that we would

>             hear of more if there were a large number of failures.  That

>             said, if

>             your governor was from 2011 thru 2013, I'd be concerned even

>             if your

>             governor isn't within the S/N range.

>             Tim

>

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>

gengrumpy

Joined: 07 May 2013
Posts: 131
Location: Tullahoma, TN

Posted: Thu Aug 18, 2016 7:07 am Post subject: MT Governor failure

Me too as Tim and mine are same vintage!



grumpy



 	  Quote: 	
		   On Aug 18, 2016, at 9:29 AM, Tim Olson <Tim(at)MyRV10.com> wrote:

 

 

 

 Thanks Werner,

 

 If you are talking to someone there, see if you can get a feeling for

 what the EARLIEST date a governor would have if it were affected.

 I'm betting that we'll find it's somewhere after 2009 or 2010,

 but I'll be more comfortable if I heard what they had to say.

 Tim

 

 

 On 8/18/2016 9:20 AM, Werner Schneider wrote:

> 

> 

> I got this morning a feedback from MT, that my Governor with

> 

> S/N 10G598G

> 

> is impacted and that I should send it to the factory to be fixed (this

> is manufactured in 2010

> 

> Werner

> 

> On 17.08.2016 08:32, Werner Schneider wrote:

>> I had just this morning an email feedback from MT Germany, they are

>> working on a new SB which should cover the impacted serial numbers so

>> they now seem to be aware of what is causing this issue?

>> 

>> Werner

>> 

>> On 17.08.2016 03:03, Tim Olson wrote:

>>> I'm thinking that most of them were delivered around the same timeframe

>>> and they are probably just differing failures but still related to some

>>> issue that came around that timeframe.  I bet the SB serial number range

>>> is insufficient.

>>> Because there are so many MT governors flying since 2005 that we would

>>> hear of more if there were a large number of failures.  That said, if

>>> your governor was from 2011 thru 2013, I'd be concerned even if your

>>> governor isn't within the S/N range.

>>> Tim

>>>

civengpe

Joined: 14 Feb 2011
Posts: 105

Posted: Thu Aug 18, 2016 7:11 am Post subject: MT Governor failure

Ok, so I just hung up with Andy with MT in Germany.  Here is what he told me.  In certain situations, the fly weights can become loose and cause the failures that we have seen.  They have already identified the modifications needed and will be publishing SB 31 this coming Monday.  All 860-3 governors manufactured between April 2010 and July 2013 are affected regardless of the type of engine.



I did encourage him to post something so that they could get ahead of the issue.

By the way, my governor is in that range.

Shannon Hicks

On Thu, Aug 18, 2016 at 9:53 AM, Shannon Hicks <civeng123(at)gmail.com (civeng123(at)gmail.com)> wrote:

 	  Quote: 	
		  Kelly,I'm just passing along what MT in Florida told me.  They have my governor in their shop and told me they have the parts on order from Germany to correct the issue.  Beyond that, I don't know what the specific issue was other than they said it only affects non certified IO-540s.

I really wish someone from MT would at least get out in front of this and post something.   

Shannon Hicks 

On Thu, Aug 18, 2016 at 9:42 AM, Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)> wrote:

 	  Quote: 	
		  --> RV10-List message posted by: Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)>

 

 I might see higher compression pistons affecting the prop via harmonics. I do not see what else about the engines would have anything to do with who put them together. For the most part, engines built by the reputable shops mentioned will have flow balanced cylinders, well balanced rotating parts and run smoother than a factory engine. I see nothing about that has anything to do with the governor. So far we are not getting any information beyond the service bulletin about where the problem might lie.

 

 On 8/18/2016 7:29 AM, Shannon Hicks wrote:

  	  Quote: 	
		   Werner,

 What engine do you have?

 

 I have an Aerosport Power IO-540 with 9.2:1 pistons and MT is telling me

 that mine is impacted as well.  From talking with MT in Florida, the

 engine is what is driving the modification requirements.  Ie Barret,

 Aerosport etc....

 

 Is this what others are hearing as well?

 

 Shannon Hicks

 

 On Thu, Aug 18, 2016 at 9:20 AM, Werner Schneider <glastar(at)gmx.net (glastar(at)gmx.net)

 <mailto:glastar(at)gmx.net (glastar(at)gmx.net)>> wrote:

 

     --> RV10-List message posted by: Werner Schneider <glastar(at)gmx.net (glastar(at)gmx.net)

     <mailto:glastar(at)gmx.net (glastar(at)gmx.net)>>

 

     I got this morning a feedback from MT, that my Governor with

 

     S/N 10G598G

 

     is impacted and that I should send it to the factory to be fixed

     (this is manufactured in 2010

 

     Werner

 

     On 17.08.2016 08:32, Werner Schneider wrote:

 

         I had just this morning an email feedback from MT Germany, they

         are working on a new SB which should cover the impacted serial

         numbers so they now seem to be aware of what is causing this issue?

 

         Werner

 

         On 17.08.2016 03:03, Tim Olson wrote:

 

             I'm thinking that most of them were delivered around the

             same timeframe

             and they are probably just differing failures but still

             related to some

             issue that came around that timeframe.  I bet the SB serial

             number range

             is insufficient.

             Because there are so many MT governors flying since 2005

             that we would

             hear of more if there were a large number of failures.  That

             said, if

             your governor was from 2011 thru 2013, I'd be concerned even

             if your

             governor isn't within the S/N range.

             Tim

 

 

 

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Kellym

Joined: 10 Jan 2006
Posts: 1700
Location: Sun Lakes AZ

Posted: Thu Aug 18, 2016 7:11 am Post subject: MT Governor failure

Interesting. I wonder what non-certified features they perceive as 

issues. Ignition?, Compression ratio? fuel injection? That should cover 

most of it. Doesn't give me any comfort to have a certified engine built 

by a well known reputable shop. I've only heard of ignition affecting 

props, somehow modifying the harmonics a bit, but that still should have 

nothing to do with the governor.



On 8/18/2016 7:53 AM, Shannon Hicks wrote:

 	  Quote: 	
		   Kelly,

 I'm just passing along what MT in Florida told me.  They have my

 governor in their shop and told me they have the parts on order from

 Germany to correct the issue.  Beyond that, I don't know what the

 specific issue was other than they said it only affects non certified

 IO-540s.



 I really wish someone from MT would at least get out in front of this

 and post something.



 Shannon Hicks



 On Thu, Aug 18, 2016 at 9:42 AM, Kelly McMullen <kellym(at)aviating.com

 <mailto:kellym(at)aviating.com>> wrote:



     

     <mailto:kellym(at)aviating.com>>



     I might see higher compression pistons affecting the prop via

     harmonics. I do not see what else about the engines would have

     anything to do with who put them together. For the most part,

     engines built by the reputable shops mentioned will have flow

     balanced cylinders, well balanced rotating parts and run smoother

     than a factory engine. I see nothing about that has anything to do

     with the governor. So far we are not getting any information beyond

     the service bulletin about where the problem might lie.



     On 8/18/2016 7:29 AM, Shannon Hicks wrote:



         Werner,

         What engine do you have?



         I have an Aerosport Power IO-540 with 9.2:1 pistons and MT is

         telling me

         that mine is impacted as well.  From talking with MT in Florida, the

         engine is what is driving the modification requirements.  Ie Barret,

         Aerosport etc....



         Is this what others are hearing as well?



         Shannon Hicks



         On Thu, Aug 18, 2016 at 9:20 AM, Werner Schneider

         <glastar(at)gmx.net <mailto:glastar(at)gmx.net>

         <mailto:glastar(at)gmx.net <mailto:glastar(at)gmx.net>>> wrote:



             

         <glastar(at)gmx.net <mailto:glastar(at)gmx.net>

             <mailto:glastar(at)gmx.net <mailto:glastar(at)gmx.net>>>

             I got this morning a feedback from MT, that my Governor with



             S/N 10G598G



             is impacted and that I should send it to the factory to be fixed

             (this is manufactured in 2010



             Werner



             On 17.08.2016 08:32, Werner Schneider wrote:



                 I had just this morning an email feedback from MT

         Germany, they

                 are working on a new SB which should cover the impacted

         serial

                 numbers so they now seem to be aware of what is causing

         this issue?



                 Werner



                 On 17.08.2016 03:03, Tim Olson wrote:



                     I'm thinking that most of them were delivered around the

                     same timeframe

                     and they are probably just differing failures but still

                     related to some

                     issue that came around that timeframe.  I bet the SB

         serial

                     number range

                     is insufficient.

                     Because there are so many MT governors flying since 2005

                     that we would

                     hear of more if there were a large number of

         failures.  That

                     said, if

                     your governor was from 2011 thru 2013, I'd be

         concerned even

                     if your

                     governor isn't within the S/N range.

                     Tim



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