COMPULSORY COOLANT CHANGE ????
On September 13th Rotax issued Service Bulletin #29 which mandated a change to
Evans Coolant within the next 100 hours and no later than December 31st 2004.
On September 15th the following Notice was issued.
THIS DOCUMENT IS GENERAL IN NATURE AND IS NOT INTENDED TO REPLACE THE
INFORMATION
PROVIDED IN THE SERVICE BULLETINS.
ALL OWNERS, OPERATORS AND MAINTENANCE PERSONNEL SHOULD OBTAIN AND CAREFULLY
REVIEW
THE FULL TEXT OF THE SERVICE BULLETIN AND ANY RELATED DOCUMENTATION.
SELECTING COOLANT TYPE FOR 912 / 914 SERIES ENGINES:
When determining the type of engine coolant to be used (standard glycol / water
mixture or Evans waterless coolant), all owners and operators of Rotax 912 /
914 series aircraft engines should carefully review the appropriate sections of
the revised Installation manuals.
The latest revisions of the Installation manuals set out new LOWER maximum
allowable
CHT temperature limits for engines using conventional water / glycol coolant.
When considering the use of conventional water / glycol coolant, owners
and operators, as well as aircraft designers and manufacturers must insure that
the new LOWER maximum CHT limits will not be exceeded.
In installations where engine cylinder head temperatures may exceed the new
lower
limits set out for conventional coolants, Evans waterless coolant must be used.
Once again use of conventional water / glycol coolant is only recommended if
engine
cylinder head temperatures will never exceed the new lower values set out
in the latest revisions of the engine installation manuals. In all other cases
Evans waterless coolant MUST be used.
Replacement pages required to update existing engine installation manuals to the
latest version may be download from:
www.rotax-owner.com/manualrev/10_11_2004/mrSB9_043_029.htm
Regards
Tony
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