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 AE300 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 (see “Diagnosing Self-Test Failures” for failure
analysis).
Cockpit Indications:
For the proper sequence of cockpit indications and possible caution alerts during the self-test, refer to
the applicable Aircraft Flight Manual.
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