Just in case somebody is not registered on tghe rotax-owners site:
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The following Mandatory Service Bulletin affecting specific 912/914 engine, gear
box and gear set serial number ranges has been released by Rotax:
SB-912-056/SB-914-038 - SB-912-056UL/SB-914-038UL Replacement of the Propeller
Gearbox for some Rotax engine type 912/914 (series).
SUMMARY OF BULLETIN:
Due to a slightly increased amount of irregularity in the form of material
inclusions
some isolated problems were detected on the gear box gear set in the field.
Such material inclusions in the area of the tooth base can lead to tooth
break under severe operating conditions. Affected gear sets must be replaced.
CHECKING IF YOUR ENGINE, GEARBOX OR GEAR SET IS AFFECTED;
Engine serial number and gear box serial number must be checked against the
affected
serial number ranges listed in the applicable SB. For engines which have
had the gear box previously removed for service and have had the original gear
set changed, the replacement gear set must also be checked against the affected
serial number ranges listed in the SB to determine if the gear set is affected.
COMPLIANCE:
During the next maintenance event or at the latest April 30th 2008.
ADDITIONAL EXPANDED VIDEO INSTRUCTIONS:
A special on-line video has been developed to supplement this mandatory SB and
add further information on checking for affected serial numbers. As well this
video provides further detailed instructions for proper removal and replacement
of the gear box and special material and tool requirements. Click here for
access to this additional information http://www.rotax-owner.com/expanded.htm
Regards,
Jos Okhuijsen
Visit - www.EuropaOwners.org
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