7 Additional Information
7.1 Propeller Self Test (Automatic Run-Up Test)
Description:
The propeller governor self test has been designed to emulate the manual run-up test performed by
the pilot of an aircraft equipped with a conventional (mechanical) propeller control lever. With the single
power lever installation of the E4P engine, the self test button must be pressed during the automatic
run up. The self test button in the cockpit has to be released once before a new (subsequent) self test
can be initiated by pressing the button again.
Release Criteria:
The propeller governor self test will only be released if the following release conditions have been met:
● Aircraft on the ground.
● Prop speed = idle (below 1150rpm).
● Power lever = idle (below 5% power lever position).
● No errors pending.
● Self test button active (and pressed during the whole test run).
● Gearbox oil temperature above 35°C
The EECU will increase the prop speed to about 1900 rpm producing thrust. Therefore the
brakes have to be applied during the whole test run to prevent the A/C from moving.
The engine oil temperature and gearbox oil temperature shall be within the green range
of the respective engine indicators before initiating the self test.
Test Abortion:
The propeller governor self test will abort immediately and the prop speed will be reduced to idle for
the following reasons:
● “Self test”-button has been released by the pilot.
● “Weight on wheels”-switch has been released for more than 1 sec.
● Power lever has been moved above the 5% position.
● An error has been detected by the EECU (for failure analysis refer to Maintenance
Manual E4.08.04 – “Diagnosing Self Test Failures”).
Cockpit Indications:
For the proper sequence of cockpit indications and possible caution alerts during the self test, refer to
the approved Aircraft Flight Manual.
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