Diagnosing Self Test Failures using the Data Logger:
If the FCM entry of a self test failure is not available or if trouble shooting multiple events from past
flight cycles, using the Data Logger function of the EECU is recommended.
The Data Logger information can be downloaded and displayed by the “AE 300 Wizard” (see “List of
Tools”).
For setup and usage of the AE 300 Wizard please refer to the latest revision of the “AE 300 Wizard
User Guide”, document number E4.Aug.Sep. The chapter “Offline Analysis using the Data Logger” in
the “Trouble Shooting”-Section explains, how to work with the Data Logger.
The AE 300 Wizard will display the Data Logger record of a successfully performed propeller self test
similar to the following example (e.g. after replacement of a faulty governor shown below).
Engine oil temperature above 50°C
Power lever to idle, propeller speed to idle
Self test starts
State 2: Propeller speed increases beyond 1900rpm
State 3: Propeller speed decreases by at least 70rpm
State 4: Propeller speed increases again beyond 1870rpm.
Switching from ECU-A to ECU-B, perform test on ECU-B
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