Figure 7-11 - Static Pressure Calibration Completion Status - Garmin G3X Touch Maintenance Manual

8. Select "Next" to continue and calibrate each pressure.
9. During the calibration at each pressure, the pressure must be held constant for 30 seconds for
the calibration step to be successful. The calibration may be cancelled at any point should the
test setup require adjustment before repeating.
10. When the static pressure calibration is complete, a status screen will show that the procedure
was successful.
Figure 7-11 – Static Pressure Calibration Completion Status
7.2.1.4 Engine Run-up Vibration Test
NOTE
The Engine Run-Up Vibration Test is required for all installations to validate the vibration characteristics of
the installation. The ADAHRS Unit Orientation and Pitch/Roll Offset Compensation (Section 7.2.1.1) are
not required prior to this procedure.
NOTE
Passing the Engine Run-Up Vibration test does not remove the requirement to rigidly mount the GSU 25D.
The Engine Run-Up Vibration Test is intended to help discover mounting issues, but successful
completion of the test does not validate the mounting of the GSU and does not account for all possible
vibration profiles that may be encountered during normal aircraft operation.
1. Power on the PFD in configuration mode if it is not already in configuration mode.
2. Select the ADAHRS Calibration Page.
3. Ensure that all the required status boxes are checked.
4. Select Engine Run-Up Test.
5. Ensure that the aircraft has been properly positioned per the on-screen instructions, then select
the Start button to begin the test.
6. Gradually increase power from idle to full-throttle and back to idle over the course of one to two
minutes; the test data is displayed as the test progresses.
NOTE
If failures are indicated, the engine run-up test may be repeated up to three times. If the test does not
pass after three attempts, the installation should be considered unreliable until the source of the
vibration problem is identified and remedied. If the engine run-up test fails repeatedly, record the values
that are reported to be out of range for future reference.
7. Select the Done softkey when engine run-up has been completed; the test results will be
displayed.
8. Ensure that test results indicate Passed, then select the Done button to return to the ADAHRS
page.
The following are potential causes for failure of the engine run-up test:

Excessive flexing of GSU 25D with respect to airframe.

Vibration or motion of the GSU 25D caused by neighboring equipment and/or supports.

Mounting of GSU 25D at a location that is subject to severe vibrations such as near engine
mounts.

Mounting screws and other hardware for GSU 25D and/or GMU magnetometer not properly
attached.
Maintenance Manual
G3X Touch EFIS Part 23 AML STC
Page 83
190-02472-02
Revision 2