Rotax 912 Series Maintenance Manual page 62

2.11) Spark plug not in accordance with specification
If by error any of the 8 spark plugs were employed which are not according to
specification of the engine manufacturer and/or not genuine Rotax
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 accord-
ance with the ROTAX
- 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: 912 Series
AIRCRAFT ENGINES
MAINTENANCE MANUAL
instructions for continued airworthiness.
®
parts, the
®
05-50-00
page 12
Rev. 1, Jan. 01/2002