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Rotax extends TBO to 2000 hours

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Roger Lee

Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

Posted: Tue Dec 15, 2009 6:26 am Post subject: Rotax extends TBO to 2000 hours

X-Mas came early.

Here is the new Rotax 2000 hr. TBO extension. It has extensions for the different 912 versions.



This is a biggie.  ENJOY!

TBO Extension.pdf

Description:

Rotax TBO Extension

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TBO Extension.pdf

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Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
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Tommy Walker

Joined: 12 Jan 2006
Posts: 442
Location: Anniston, AL 36207

Posted: Tue Dec 15, 2009 4:18 pm Post subject: Re: Rotax extends TBO to 2000 hours

Roger,



Yes that is wonderful news.  You and I (and thousands of others) know what a fine, dependable engine this is.



Great Christmas Present.



Tommy Walker in Alabama

Do Not Archive

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Tommy Walker
N25A - Anniston, AL

lucien

Joined: 03 Jun 2007
Posts: 721
Location: santa fe, NM

Posted: Tue Dec 15, 2009 7:46 pm Post subject: Re: Rotax extends TBO to 2000 hours

 	  Roger Lee wrote: 	
		  X-Mas came early.

Here is the new Rotax 2000 hr. TBO extension. It has extensions for the different 912 versions.



This is a biggie.  ENJOY! 	




Hah! Says you! Mine doesn't qualify because it's affected by SB-912-029 which knocks it out of the extension. the Scrooges at Rotax!



But seriously, this is a great development for the 912. Along with the hours extension the time limit is extended to 15 years. 



The 912 is once again a good deal even at the 20K price point. The longevity matches the overall cost now making it once again best bang/buck for 100hp.



LS

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LS
Titan II SS

ami(at)mcfadyean.freeserv
Guest

Posted: Wed Dec 16, 2009 1:52 am Post subject: Rotax extends TBO to 2000 hours

Only  a great Xmas present for some; pre-2006 engines not affected!



Duncan McF.



---

lucien

Joined: 03 Jun 2007
Posts: 721
Location: santa fe, NM

Posted: Wed Dec 16, 2009 5:54 am Post subject: Re: Rotax extends TBO to 2000 hours

 	  ami(at)mcfadyean.freeserv wrote: 	
		  Only  a great Xmas present for some; pre-2006 engines not affected!



Duncan McF.



--- 	




Well at least the differences seem to be exceedingly minimal. The crankcase SB that affects mine doesn't look like a hard "AD" where you're flying on spit and bailing wire unless you immediately land and replace X, Y, Z before the next flight..... 



Having read through this other SB it, looks like a cautionary inspection regime for a condition that can happen under certain cases of abuse. 

i.e. long as you run a balanced prop, don't overreve or overheat, keep carburetters balanced, maintain the gearbox, etc., it should hold together normally.



So we could probably still run our motors to 2000hrs or more, just not at the blessing of Rotax. 



I still have about 1100 hours and about 5 years to go on mine and I may not even be able to hit that on this particular airframe....



LS

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LS
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Roger Lee

Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

Posted: Wed Dec 16, 2009 6:40 am Post subject: Re: Rotax extends TBO to 2000 hours

Lucien,



Let's look at it again.

What's your engine serial number and do you know what year your was Mfg. or at least close? Almost everyone got an extension that owns a 912. The pre 2006 guy's only need to make to simple mods.

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Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056

lucien

Joined: 03 Jun 2007
Posts: 721
Location: santa fe, NM

Posted: Wed Dec 16, 2009 7:29 am Post subject: Re: Rotax extends TBO to 2000 hours

 	  Roger Lee wrote: 	
		  Lucien,



Let's look at it again.

What's your engine serial number and do you know what year your was Mfg. or at least close? Almost everyone got an extension that owns a 912. The pre 2006 guy's only need to make to simple mods. 	




Hi Roger,

I'm pretty sure I'm SOL. My motor's ser. no is 5644130 (a 912ULS). I'd estimate it was made in late 2004. The original builder put it on the plane in Jan. 2005.



Looking at the TBO extension SB, this falls right in the upper edge of the range where new crankcase halves are needed to qualify for the TBO. I uncovered SB-912-029 which has the exact same latest SE. no. in its range as the TBO extension range for the crankcase halves. So I assume this is what Rotax is concerned about.

Mine of course has not been apart since new...



A huge block of 912ULS engines look like they're excluded because of this CC SB. If I were Rotax, I'd say that's the right thing to do too given this particular issue (possible cracks in CC) so this isn't weird to me.



Not too big of a deal as I still have 7 years and 1140 hours to go on mine... just kind of irritating 



OTOH, it might remind folks to look at this SB if their motors are affected and do the inspection. I'm going to look mine over officially today with a magnifying glass so I can make a logbook entry. Sounds like a visual inspection is all that needs to be done (no magnaflux'ing or anything like that).



LS

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LS
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Roger Lee

Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

Posted: Wed Dec 16, 2009 8:42 am Post subject: Re: Rotax extends TBO to 2000 hours

Hi Lucien,



You might be right. It's a new day and I sat down and read the TBO SB this morning with my microscope, it was just too late last night. I took a long hard look at the TBO bulletin and the one you suggested. So long as your crank case number is greater than 27.811 or the production year is 2006 your good to go or your engine number is 5646560 > your good. Previous to that you may not qualify. A new crank case is $4500. Personally I think they could have included those other engines. If they are good up to 1500 hrs. then they will most likely be good another 500. They could have just added a special check or make you put an additional comment in your maint. logbook.



You know if enough people were to write to Rotax overseas and state such a thing maybe they would make an addition. Never hurts to try.

Rotax owners speak up an be heard. All they can say is no and you would be no worse off. Might as well ask, but make sure you ask you also give a solution and don't just complain. Give them a good idea like a additional logbook entry at each 100 hr. inspection. They do make revisions to SB's.

_________________
Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056

lucien

Joined: 03 Jun 2007
Posts: 721
Location: santa fe, NM

Posted: Wed Dec 16, 2009 9:13 am Post subject: Re: Rotax extends TBO to 2000 hours

 	  Roger Lee wrote: 	
		  Hi Lucien,



You might be right. It's a new day and I sat down and read the TBO SB this morning with my microscope, it was just too late last night. I took a long hard look at the TBO bulletin and the one you suggested. So long as your crank case number is greater than 27.811 or the production year is 2006 your good to go or your engine number is 5646560 > your good. Previous to that you may not qualify. A new crank case is $4500. Personally I think they could have included those other engines. If they are good up to 1500 hrs. then they will most likely be good another 500. They could have just added a special check or make you put an additional comment in your maint. logbook.



You know if enough people were to write to Rotax overseas and state such a thing maybe they would make an addition. Never hurts to try.

Rotax owners speak up an be heard. All they can say is no and you would be no worse off. Might as well ask, but make sure you ask you also give a solution and don't just complain. Give them a good idea like a additional logbook entry at each 100 hr. inspection. They do make revisions to SB's. 	




Well... $4500... + taking the engine all apart... + who knows what else.... may as well get a new engine. Regrettably, the 912 is also pretty much a throwaway like the 2-strokes once you have to do major stuff like a rebuild or replacing crankcases and such due to the excessive parts costs.....



But apart from that, since mine's in an experimental, I go on-condition anyway so the paperwork aspect of it isn't that big of a deal for mine. I'd feel confident, given that the motors that qualify aren't substantially different from mine and many others that dont, I could go on-condition up to 2000 hours with it (as long as I also do the additional maint, and the CC inspections, etc).



So far it's been a good engine. I do have to do a carb balance and get the friction torque checked tho ASAP. But it looks like it's going to last a while...



LS

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LS
Titan II SS

Roger Lee

Joined: 10 Jan 2006
Posts: 1464
Location: Tucson, Az.

Posted: Wed Dec 16, 2009 9:19 am Post subject: Re: Rotax extends TBO to 2000 hours

That's the nice thing about experimental's is you are allowed to go on condition. Many owners don't do 100 hr inspections with an oil analysis and other inspections from the line maint. manual along the way, but I would highly recommend it and it is pretty much what's called for for the on condition program. I'm sure you'll easily make 2000 +hrs.

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Roger Lee
Tucson, Az.
Rotax Instructor & Rotax IRC
Light Sport Repairman
Home 520-574-1080 TRY HOME FIRST
Cell 520-349-7056

Bearup

Joined: 24 Jan 2008
Posts: 12
Location: American Falls, Idaho

Posted: Wed Dec 16, 2009 10:13 am Post subject: Rotax extends TBO to 2000 hours

The TBO of aircraft engines is simply a recommendation from the engine manufacturers. When flying behind an engine under part 91 of the FARs', there is no requirement to overhaul any aircraft engine when the engine reaches the recommended TBO. On the other hand, when the aircraft is used for higher, such as in a flight schools, a 135 air taxi, etc, that is when the engine must be removed and overhauled when they reach TBO. Basically those flying certificated, experimental amateur-built aircraft,  ELSA, and SLSA airplanes are free to fly behind the engines far beyond the TBO, as long as they are signed off and determined to be in airworthy condition at the annual, or conditional inspections.

 

 Stan

    [quote][b]

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Stan Bearup
American Falls, ID
Airport Manager
www.justkitplanes.com

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