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 1000rpm).
Power lever = idle (below 5% power lever position).
No errors pending
Self test button active (and pressed during the whole test run).
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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