G1000 Nav III Line Maintenance Manual Page 4-25190-00352-00 Rev. L4.4.5.3 Procedure D: Engine Run-Up Vibration TestFigure 4-8. Engine Run-UpCalibration Procedures A1 and B are not required prior to this procedure.1. Initiate the AHRS engine run-up vibration test procedure by performing the following steps:a) Select the ENGINE RUN-UP TEST procedure and press the ENT key.b) Follow the checklist items displayed on the PFD, and press the ENT key as each one is completed orconfirmed. When the CALIBRATE field is blinking, press the ENT key to begin the procedure.2. The PFD display instructs the operator to gradually increase power from idle to full throttle and back toidle over a period of 2-4 minutes.3. When the operator has completed the engine run-up and the engine is back to an idle setting, press theENT key to indicate that the process is complete. When this is done, the TEST COMPLETE field stopsblinking.4. The PFD informs the operator if the installation has passed or failed the vibration test. If the test fails, thespecific measurements causing the failure are identified and numeric values are displayed on the PFD.If failures are indicated, the engine run-up test may be repeated once or at most twice. If the test does notpass after three attempts, then the installation should not be considered reliable until the source of thevibration problem is identified and remedied.In the event of repeated failure of the engine run-up test, record the values that are reported to be out ofrange for future reference.
