d06322.fm
27 March 2017 12-10-00
page 8 of 11
Copyright - BRP-Rotax GmbH & CO KG. All rights reserved.
SI-912 i-001R4
SI-912-016R9 / SI-914-019R9
SERVICE INSTRUCTION
5) Fuel
For ROTAX® aircraft engines different fuel types are available. See Operators Manual of the rele-
vant engine type and/or the table in chapter 5.3.
NOTE: If none of the fuels mentioned in chapter 5.3 is available, consult the corre-
sponding European Standard EN228 as a reference. The fuel to be as-
sessed, has to be equal or better at least in terms of the octane number and
the maximum ethanol content.
NOTE: The aircraft manufacturer has to show compliance to the relevant require-
ments on aircraft level regarding vapor lock as this issue is strongly depen-
dent on the aircraft fuel system design.
5.1) Automotive fuels
In addition to AVGAS various automotive fuel types with different quality are available. Due to var-
ious environmental, economic and political reasons a number of fuel types with different amounts
of ethanol blend are available. Therefore the maximum amount of ethanol blend is defined as fol-
lows:
5.1.1) E10 (Unleaded gasoline blended with 10% ethanol)
In addition to AVGAS and unleaded automotive fuel (Mogas) the ROTAX® 912/914 Series of
engines are now approved for use with E10. Fuels that contain more than 10% ethanol blend have
not been tested by BRP-Rotax and are not permitted for use.
5.1.2) Suitability of fuel system components of airframe
BRP-Rotax urges owners to confirm with their airframe manufacturer that ethanol blended fuels of
up to 10% (E10) are compatible with all fuel system components.
It is the responsibility of the aircraft manufacturer to test their fuel system components and supply
any further information on techniques, procedures and limitations of using ethanol blended fuel.
BRP-Rotax recommends that aircraft manufacturer and owner/operators read the following:
- FAA Advisory Circular Letter AC 23.1521-2
- FAA Special Airworthiness Information Bulletin CE-07-06
- EASA Safety Information Bulletin – SIB 2009-02
These contain details regarding the use of ethanol (alcohol) blended fuels and the type certificate
requirements.
It is strongly recommended that non-certified aircrafts also conform to the information given in the
above documents.
5.2) AVGAS fuel additives
Additives under the names of Decalin® and Alcor TCP®, which aid the scavenging of lead depos-
its have not been tested by BRP-Rotax. Field experience shows that these products have no det-
rimental effect on the engine, when used in the recommended manner.
Always follow the additive manufacturers instructions especially with regard to health and safety
precautions. BRP-Rotax only has field experience with Decalin Runup® and Alcor TCP® brands.
Other similar additives are not recommended as BRP-Rotax cannot comment on their suitability
for the 912 i, 912 and 914 Series engine types.
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