Spark Plug Not In Accordance With Specification; Non Compliance Of Fuel Quality - Rotax 912 Series Maintenance Manual

3.10) Spark plug not in accordance with specification

General note If by error any of the spark plugs were installed which are not according
to specification of the engine manufacturer and/or not genuine ROTAX
parts, the following verification will be necessary.
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3.11) Non compliance of fuel quality

General note
The use of unsuitable fuel quality has to be entered in the engine log
book.
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Effectivity: 912 Series
Edition 3 / Rev. 1
BRP-Powertrain
MAINTENANCE MANUAL
Spark plug not in accordance with specification
Step
Mark position of the spark plugs (e.g. cyl. 1 top) and remove all spark plugs.
Inspect the spark plugs for damage (formation of melt beads, burn off). At
heavy melt beads or bad burn off, inspect the piston dome and cylinder wall
by borescope. If parts are damaged, the engine must be inspected, repaired
or overhauled in accordance with the BRP-Powertrain instructions for con-
tinued airworthiness.
Inspect all systems for correct function.
Detailed inspection of affected engine components.
Inspect spark plug thread for damage (especially at bad burn off).
Differential pressure check. See chap. 12-20-00 section: 5).
Change oil and oil filter.
Non compliance with fuel quality
Step
Visual inspection of engine
Empty the fuel system according to the instructions of cell manufacturer
Replace fuel filter
Flush fuel system
Check differential pressure
Engine test run
Procedure
Procedure
05-50-00
page 21
January 01/2013