Spark Plug Not In Accordance With Specification - Rotax 914 Series Maintenance Manual

2.11) Spark plug not in accordance with specification

If by error any of the 8 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.
- 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, repair or overhaul the engine in
accordance with the BRP-Rotax instructions for continued airworthiness.
- Inspect all systems for correct function.
- Detailed inspection of affected engine components.
- Inspect spark plug thread for damage (especially at bad burn off).
- Inspect of pressure differential. Max. allowance, 10 % pressure loss since the
last check.
- Change oil and oil filter.
Effectivity 914 Series
Edition 1 / Rev. 0
BRP-Rotax
MAINTENANCE MANUAL
05-50-00
page 15
May. 01/07