Important AD for Rotax 912 engines

[danny_galaga]

https://services.casa.gov.au/airworth/airwd/ADfiles/PISTON/ROTAX/2026-0121-E.pdf?utm_source=Swift Digital&utm_medium=Email&utm_campaign=Airworthiness Directives

 

I can't actually tell if my own engine is affected. What does Rotax 912 A1 etc mean?

 

Edited June 27 by danny_galaga

[T510]

There's a pdf in this thread with engine /gearbox numbers

 

 

[danny_galaga]

Cool. I still can't tell if my ENGINE is in the list, but it's academic because my gearbox definitely is, so I guess I'm going to have to get it inspected. I could do it myself, but it's good to have an official mechanics stamp in the paperwork I think. 

[Blueadventures]

Would be nice if you could enter your engine and gearbox number into a Rotax search and receive all applicable notices and then compare then with log and maintenance history of the unit.  The search in a simpler format to what we can do now (the present method with an AI driver.)

[danny_galaga]

Latest is my mechanic says mine isn't affected after all

[Blueadventures]

A friend who has a new engine I installed has asked me and a search in the document finds his g/box model and s/n not listed and engine not listed.  Let a message to him to that effect and I'll ask him to send his model / serial numbers to Floods to verify100% as well.  Nice yours is good to go as well.

[skippydiesel]

Rotax are required to put out two directived - one for certified engined and one for uncertified  - even when the directive applies equally to both engine classifications.

 

The original  Rotax issued AD's can be found in the Rotax Owners Forum and I am sure in other places.

 

The AD for certified engines has a lot more relevant information (to both engines) than the uncertified, which is not much more than a list of engine & gearbox numbers.

 

You should know if your engine is certified or not.

 

Look in the respective AD for your engine/gearbox serial number. If its not there the AD does not apply to your engine /gearbox.

 

Note: Owners of engines that have been fitted with later/more resent gearboxes, need to search for the gearbox serial number alone.

 

 "What does Rotax 912 A1 etc mean?"

 

I stand to be corrected - the letter after the 912 ( iS, UL or ULS) are for certified (A?) non certified (no letter, just numbers.)

 

😈

[Blueadventures]

On 01/07/2026 at 11:51 AM, danny_galaga said:

Latest is my mechanic says mine isn't affected after all

My friend sent a question to Bert Floods as engine purchased last year and it is affected.  They did not say what was needed or where to get it done.

 

I can't find any info about what is required.  Remove gearbox and send away?  Anyone know what's required.  He will likely contact Floods again or Wal.

[skippydiesel]

47 minutes ago, Blueadventures said:

My friend sent a question to Bert Floods as engine purchased last year and it is affected.  They did not say what was needed or where to get it done.

 

I can't find any info about what is required.  Remove gearbox and send away?  Anyone know what's required.  He will likely contact Floods again or Wal.

If not malady a member - join the Rotax Owners Forum - this topic has been extensivly covered.😈

[danny_galaga]

I neli

1 hour ago, Blueadventures said:

My friend sent a question to Bert Floods as engine purchased last year and it is affected.  They did not say what was needed or where to get it done.

 

I can't find any info about what is required.  Remove gearbox and send away?  Anyone know what's required.  He will likely contact Floods again or Wal.

I believe it can be inspected by taking off the fuel pump, so you wouldn't need to remove the gearbox. But obviously I haven't done it myself so find out for sure.

[Blueadventures]

5 minutes ago, danny_galaga said:

I neli

I believe it can be inspected by taking off the fuel pump, so you wouldn't need to remove the gearbox. But obviously I haven't done it myself so find out for sure.

Thanks Danny  I'm just curious as my friend did not get any info on what his next step is.  Engine was fitted Feb 2025 and bought I guess late 2024.   I have a call message to Floods asking if Harry or someone can call back when free and gave them the owners name as he emailed them last week.  I'll post anything I hear.  Cheers.

[sfGnome]

With great relief, I ascertained yesterday (I’ve been away) that my 2025 build 912ULS is not on the list. What I did notice was that the overwhelming majority (i.e. almost all) of the affected engines were 912iS and 914, so it looks like it was a batch assembly issue (“oh, was I supposed to put those parts in??”). A ridiculous number of years ago when I was working on a production line as an apprentice, it was each person’s responsibility to check the work of the person before you, so (theoretically), errors wouldn’t be hidden inside final assemblies. I expect that Rotax’s procedures have been updated now. 

[Blueadventures]

19 minutes ago, sfGnome said:

With great relief, I ascertained yesterday (I’ve been away) that my 2025 build 912ULS is not on the list. What I did notice was that the overwhelming majority (i.e. almost all) of the affected engines were 912iS and 914, so it looks like it was a batch assembly issue (“oh, was I supposed to put those parts in??”). A ridiculous number of years ago when I was working on a production line as an apprentice, it was each person’s responsibility to check the work of the person before you, so (theoretically), errors wouldn’t be hidden inside final assemblies. I expect that Rotax’s procedures have been updated now. 

Nice, yes looks like from certain assembly lines, so not all build lines.  I'm still waiting to talk to Floods as my friends is not listed. He’s sending me the email he got answering his query when home tonight. His serial number  90408 is not in the list it’s on a 912ULS

Edited yesterday at 03:58 AM by Blueadventures