Optional accessory drive flange for ROTAX Aircraft Engines

Optional accessory drive flange for ROTAX Aircraft Engines
Optional accessory drive flange for ROTAX Aircraft Engines

The optional accessory drive flange is not part of the Engine Type Design. Such a PAC part has been then tested and released by BRP-Rotax, but it might not be certified for the relevant engine type. In such a case the correct function in conjunction with the entire system is the responsibility of the aircraft manufacturer and must be carried out jointly with the aircraft.

Planning information
“PAC” Service Instruction Documents provide detailed information on ROTAX® Aircraft Engine Parts and Accessories. Depending on the engine type used with, the referenced parts and accessories may be provided with or without EASA certification or ASTM compliance. Certification / Compliance of referenced Parts and Accessories must in such cases be completed by the aircraft OEM.

To obtain satisfactory results, procedures specified in this publication must be accomplished with accepted methods in accordance with prevailing legal regulations. BRP-Rotax GmbH & Co KG cannot accept any responsibility for the quality of work performed in accomplishing the requirements of this publication.

In addition to this technical information refer to current issue of

  • in general Illustrated Parts Catalog (IPC)
  • in general Installation Manual (IM)
  • in general Maintenance Manual Line (MML)
  • in general Maintenance Manual Heavy (MMH)
Material requirement per engine
Part no. Description Application
953978 Generator flange Crankshaft magneto side
430225 O-ring 15.9x2.3 Plug screw

Special tooling/lubricants- /adhesives- /sealing compounds
Price and availability will be supplied on request by ROTAX® Authorized Distributors or their independent Service Centers:

Part no. Description Application
877419 Protection mushroom Optional accessory drive (generator) flange
n.a. Puller tool assy. Optional accessory drive (generator) flange. See Chapter 4: Appendix, Z 13545
841602 Hex. screw M16x1.5x40 Puller tool
n.a. Hex. screw UNF 3/8-24x3/4 Puller tool
899788 LOCTITE 648  
- LOCTITE 7063  
- Abrasive pad for surface finishing, 3M Scotch-Brite Multi Flex - very fine or ultra-fine*  

See current Installation Manual (IM) for the respective engine type.
Never attach a generator or other accessory directly to the crankshaft and never attach the generator support directly to the engine (like ignition housing etc.). Never use the threads of the ignition housing or on the engine for installa- tion and support strut attachment of an external alternator.

ROTAX reserves the right to make any amendments to existing documents which might become necessary due to this standardization, at the time of next revision or issue. NOTE: Before maintenance, review the entire documentation to make sure you have a complete understanding of the procedure and requirements.