71-00-03 Engine Ground Run
After work on the engine it is recommended to perform a ground run.
Aircraft engine ground run must be performed in a secure and save area protected
against movements of unauthorised persons.
Accidents can cause severe injury or even death.
Aircraft engine ground run must be performed by authorised persons only.
The area of the propeller must be kept clear. If objects get into the propeller,
propeller and engine can be seriously damaged.
To execute the Engine Ground Test Run, following steps have to be performed consecutively:
Start the engine and warm up. Refer to the applicable Aircraft Flight Manual (AFM) for details.
Conduct EECU self test. Refer to the applicable Aircraft Flight Manual.
Start engine test
1. Ensure that the Voter switch is in “ECU A” position.
2 Move power lever quickly to the full-load position. The propeller must accelerate
smoothly and steadily up to the propeller speed of 2300 rpm. The load indicator must
show more than 95%. Maintain this status for 30 seconds, and then return the power
lever to the idle position.
3. Move the Voter switch to the “ECU B” position. Move the power lever to the
full-load position. The propeller must accelerate smoothly and steadily up to the
propeller speed of 2300 rpm. The load indicator must show more than 95%.
Maintain this status for more than 30 seconds, and then return the power lever to the
idle position.
4. Return the Voter switch to the “Auto” position.
Shut off engine in accordance to the applicable Aircraft Flight Manual (AFM).
Read out enginie data using the AE 300-Wizard. Verify that no failures are present in the EECU Fault
Log. If failures are stored in the EECU Fault Log, the root cause must be evaluated and the reason for
the failure has to be eliminated. Repeat the engine ground run as necessary.
After the Engine Ground Run perform a visual inspection of the engine. Look especially for leakage
and chafing.
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