Today Rotax released Service Bulletins SB-912-065/SB-914-046 for certified engines and SB-912-065UL/SB-914-046UL for non-certified engines. These are very important bulletins dealing with a mandatory inspection of the carburetor floats on a specific serial number range of engines. Owners should check to see if these bulletins apply to their engines.
Here are the serial numbers affected.
All versions of the engine type:
| Engine type | Serial number |
| 912 A | from S/N 4 410 957 |
| 912 F | from S/N 4 413 008 |
| 912 S | from S/N 4 924 408 |
| 914 F | from S/N 4 421 136 |
Also affected are all floats part no. 861184 which have been installed as spare part or during engine repair/general overhaul since 1. July 2012.
NOTE: The affected floats were delivered with the engines listed above.
The part number and serial numbers of the carburetors:
| Carburetor type | Serial number |
| Carburetors 912 A/F | 1/3 part no. 892500 – from S/N 116434; 2/4 part no. 892505 – from S/N 115846; |
| Carburetors 912 S: | 1/3 part no. 892530 – from S/N 121087; 2/4 part no. 892535 – from S/N 120980; |
| Carburetors 914 F: | 1/4 part no. 892520 – from S/N 116207; 2/4 part no. 892525 – from S/N 120228; |
The carburetor and/or the float may have been removed from the first delivery engine and used on another one. Therefore the serial number of the carburetor is also important as the engine serial number. For relevant information, see the maintenance records and/or the logbook.
To get a copy of the official bulletins, please go to www.flyrotax.com . To download a copy from our server, click here for SB-912-065/SB-914-046 and here for SB-912-065UL/SB-914-046UL
Questions and Answers regarding this Service Bulletin:
Q: So what is this all about?
A: Simply put, it was found that some floats may be retaining fuel and thereby increasing in weight. This is not good. It must be remembered that not all floats seem to be doing this, that is why there is a test procedure outlined in the Service Bulletin. Also, at this point in time, it is not known what is causing this retention and there is no simple replacement fix, that is why there is a request that this inspection happen every 25 hours of flight or 60 hours total time, until a solution for this is found.
Q: Who is authorized by the factory to perform this work?
A: Rotax requires an independent Rotax Maintenance Technician (iRMT) with a current Maintenance or Higher rating. You can find these in the US, Central or South America by going to www.rotaxirmt.com
Q: All this seems really complicated.
A: It may seem a little overwhelming at first, but Rotax has done a really good job of explaining the testing procedure in the bulletin. If you are still not sure, please contact your closest independent Service Centre or iSC. They will be more than happy to give you all the details.
Here is a list:
| AREA | CONTACT | WEBSITE |
| WESTERN USA | CALIFORNIA POWER SYSTEMS | http://www.cps-parts.com/ |
| CENTRAL USA | LEADING EDGE AIR FOILS | http://www.leadingedge-airfoils.com/ |
| EASTERN USA | LOCKWOOD AVIATION SUPPLY | http://www.lockwood.aero/ |
| LATIN AMERICA | LAG ULTRALIGHT | http://lagultralight.com/ |
| BRAZIL | Cruzeiro do Sul Aviação | http://www.cdsav.com.br |
| ARGENTINA | ULTRALIGHT URL | http://www.ultralight.com.ar/ |
If you are outside the above areas, please go to www.flyrotax.com and find the service centre in your region.
Q: Why are there three types of warranty claims?
A: Well, technically there are only two. The first inspection covers the tooling you need to perform the inspection. Then every other inspection after that is considered without tooling as it was already supplied. Why the need for extra claim types depends on whether or not the floats needed to be changed. Again see your iSC to assist you with this.
