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MAINTENANCE MANUAL
BRP-Powertrain
Effectivity: 912 i Series
Edition 1/Rev. 0
12-20-00
page 11
January 01/2012
4.1)
Compression check for fault-tracing
General note
In the course of fault-tracing a
compression check
can also be per-
formed.
A compression tester is required to check compression. The compres-
sion should be between 9 and 12 bar (900 kPa and 1200 kPa).
Instruction
Compression check for fault-tracing.
Measurement
Individual readings for the cylinder must not differ by more than 2 bar
(200 kPa).
If the value is below 6 bar (600 kPa), inspection, repair or overhaul must
be carried out in accordance with the BRP-Powertrain instructions for
continued airworthiness.
- Detailed inspection of affected engine components.
Special tools
For accomplishment the following special tool is required.
WARNUNG
WARNING
Keep the propeller area clear!
All LANE select switches must be “
OFF
“.
Step
Procedure
1
Operate the engine until the temperatures have stabilized for a period of 5 min
(engine oil temperature between 50 to 70 °C (122 - 160 °F).
2
Unscrew and remove top spark plugs.
3
Press compression tester (1) over the spark plug hole and use the starter to
turn the engine over with open throttle until maximum pressure is reached.
4
Successively take readings on all four cylinders and compare results.
Part number
Description
n.a.
Compression tester
Содержание 912 iS Sport
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