16-8 PROPULSION / ENGINE
ICON A5 / MAINTENANCE MANUAL CHANGE C2
Parts Required
None
Aircraft System and Number
13—Propulsion
Consumables
None
1. Engine start according to latest Operations Manual.
2. After engine start, observe oil pressure. Oil pressure must be built up within 10 seconds. If not,
immediately shut down engine.
3. Let engine run for approximately 2 min at 2,000 RPM. Then first use the throttle lever to bring
the engine to approximately 2,500 RPM for 5 seconds to allow the generator to switch from lane
B to lane A, 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 (200 kPa) engine speed may be increased.
5. Ignition check as per the current Operations 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.
7. After full-load run, conduct a short cooling run with engine stabilized at idle for 2 min to prevent
formation of vapor lock in cylinder heads. This is necessary to prevent steam locks in the cooling
and fuel system after shut-down.
8. Shut engine down.
NOTE: Shut engine down to reduce likelihood of unintended start by
someone else.
NOTE: On switching off the engine, switch ignition off and withdraw the
ignition key.
9. Inspect oil pump rotary seal on the water pump for leakage. For further information on ensuring
filter secure, see the Rotax 912 iS Sport (912 iS 2) Maintenance Manual for Line Maintenance
12.3.1 section 12-20-00.
NOTE: Due to the design of the rotary seal, the manufacturer tolerates a
certain amount of leakage. If the leakage is in excess of the limit,
the rotary seal must be renewed.
Tolerated leakage:
For this check the engine must be operated until all temperatures have stabilized for a period of 5
minutes. At that point shut down engine and ensure the ignition is switched off and engine secured
against unintentional operation. Coolant must not drip through leakage bore, located at the base of the
ignition housing, for a period of 1 minute after the engine has been stopped. In case this leakage test
can not be passed, the rotary seal must be renewed.
10. Replenish engine oil and coolant as required once engine has cooled down.
NOTE: If the oil filter has been replaced, re-tighten by hand after the test
run on a cold engine. Screw on the oil filter until oil filter gasket is
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