BRP-Rotax
MAINTENANCE MANUAL LINE
TEST RUN OF ENGINE
General note
m WARNING
Danger of life threatening injuries caused by the propeller, rotating and stressed
parts of the engine!
Always observe the engine from a safe place while it is running. Check that the cockpit
is occupied by a competent operator.
Preparation Preparation of the engine for test run:
• Ensure that all the operating fluids (engine oil, coolant, fuel) are replenished to the
specified level.
• Make sure that no loose objects (e.g. tools) are left in the engine compartment.
• Inspect tight fit of the propeller.
• Anchor the aircraft suitably to the ground and fix wheel chocks. Ensure that the propeller
zone is clear and safe before starting the engine.
Test run Test run as follows
For the special checks, see Operators Manual for the engine type 912 i
Series .
Step
Procedure
1
Engine start according to latest Operators Manual.
2
After engine start, observe oil pressure. Oil pressure has to be built up with-
in 10 sec.
3 Let engine run for approx. 2 min. at 2000 rpm. Then first use the throttle lev-
er to bring the engine to approx. 2500 rpm and then run through warming
up period, until the oil temperature reaches 50 °C (122 °F).
4
Check temperatures and oil pressure: At a steady oil temperature above 50
°C (122 °F) and oil pressure above 2 bar (29 psi) engine speed may be
increased.
5
Ignition check as per the current Operators Manual.
6
Conduct a short full throttle run and check that the engine reaches the max.
full power speed. Consult the pilot’s operating handbook for maximum
speed, as it depends on the propeller used.
7
After full-load run, conduct a short cooling run to prevent formation of va-
pour lock in cylinder heads. This is necessary to prevent steam locks in the
cooling and fuel system after shut-down.
Effectivity: 912 i Series
Edition 2/Rev. 0
12–20–00
Page 15
September 01/2018
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