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3.3 Checklists and stages of flight
3.3.1 Before starting the engine
Check outs which need to be carried out, especially before the first start of the engine in the
day, or in the case the engine had cooled down, are written in detail in the engine
maintenance manual of your airplane, which was delivered to you with other documents.
Here are some of the basic principles.
- before attempting to start the engine, make sure all conditions for the safe start are
maintained
- if the engine is cold, by manually turning propeller several times, turn the engine in the
direction of engine shaft rotation
- if the airplane is equipped with an adjustable propeller, set it to the smallest angle of attack
WARNING
Always use chocks and parking brake to stop the airplane and turn both
ignition circuits OFF during this procedure
•
propeller (cold engine)
•
radio
•
transponder
•
fuel valve
•
choke
•
throttle
•
main switch
•
ignition
•
brakes
•
control
stick
•
situation around airplane
•
starter
•
instruments
•
radio
Turn 5x
(
ignition OFF, main switch OFF!!!)
OFF
OFF
OPEN
OPEN (cold engine), CLOSE (warm engine)
full back (cold engine), 1 cm open (warm engine)
ON
ON
apply
pull back, hold between your knees
PROP CLEAR
crank engine
check - oil pressure within 10 sec. min 20 kPa
ON
ON
If the engine does not start, let the starter cool down for about 2 minutes and then repeat the
start up. Overheated starter loses its output very quickly and the engine is hard to start
because it does not rev up to the sufficient engine revolutions.
After starting the engine, set the warm up RPM and slowly remove the choke.
3.3.1.1 Engine run up
The engine run up is performed after the engine has warmed up with the goal to verify its
operating efficiency. The procedure for the engine warm up and performing the test of
ignition is again introduced in its full length in the engine manual. Follow the procedures
enclosed there.
We will mention only the basic principles:
- let the engine run for about 2 minutes at 2000 RPM and then continue to warm up at
2500 RPM until the oil temperature reaches 50˚ Celsius. Check the temperatures and the
pressures and also check if all operating values have been reached.
- at 4000 RPM carry out the test of ignition, the drop of the revolutions for each circuit cannot
be more than 300 RPM; the difference in the RPM between both circuits cannot be more
than 120 RPM.
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