ALPHA Trainer
www.pipistrel-aircraft.com
REV. 0
POH-162-00-40-050
Engine start-up
Before engine start-up
CAUTION!
To ensure proper and safe use of the aircraft it is essential to familiarize yourself with
engine’s limitations and engine manufacturer’s safety warnings. Before engine start-up make sure
the area in front of the aircraft is clear. It is recommended to start-up the engine with the aircraft’s
nose pointing into the wind.
Make sure the fuel quantity is sufficient for the planned duration of flight.
Make sure the pitot tube is uncovered and rescue parachute safety pin removed.
Engage wheel brakes. Engage parking brake.
Engine start-up
Make sure fuel valve is OPEN and Master switch in OFF position, Avionics switch OFF.
Should the engine be cold, apply choke (lever full back).
Throttle idle position.
Set master switch ON, Avionics switch ON. Set both magnetos ON, engage engine starter. Verify oil
and fuel pressure within limits.
Set RPM to 2000 for the first two minutes, then 2500 RPM. Slide the choke lever forward gradually.
CAUTION!
When the engine is very cold, the engine may refuse to start. Should this occur,
move the choke handle fully backwards and hold it there for some 20 seconds to make mixture
richer.
Engine warm-up procedure
The engine should be warmed-up at 2500 RPM up to the point working temperature of oil is reached.
Warming-up the engine you should:
1 Point aircraft’s nose into the wind.
2 Verify the engine temperature ranges within operational limits.
CAUTION!
Avoid engine warm-up at idle throttle as this causes the spark plugs to turn dirty
and the engine to overheat.
After the working oil temperature has reached, engage wheel brakes and control stick in full back
position, first set engine power to 4000 RPM in order to perform the ignition check. Set the ignition
switches (MAG L/R) OFF and back ON one by one to verify RPM drop of not more than 300 RPM.
When the ignition check has been completed, add full power (throttle lever full forward) and monitor
engine’s RPM. Make sure they range between maximum recommended and maximum allowable RPM
limits.
NOTE
The engine does not reach 5800 RPM on ground. Engines are factory set to reach maximum
ground RPM of 5300 - 5500 at sea level at 25 degrees Celsius. Maximum ground RPM may vary de-
pending on the season and service elevation.
CAUTION!
Should engine’s RPM be lower than the recommended on ground amount (min.
5000 RPM) or in excess of maximum allowable RPM on ground (5800) during this maneuver, check
engine and wiring for correct installation.
WARNING!
If the aircraft is equipped with airbrakes (optional), ensure they are closed for
takeoff! See SPOH-161-00-41-050 - Electric airbrakes POH supplement - for additional information
about use, setting and testing.
Normal procedures
4-6
Summary of Contents for 890 AT 912 LSA
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