Label
(octal) Description
377 Equipment identifier
371* General Aviation equipment identifier
*These labels are formatted per the General Aviation Manufacturers Association (GAMA) definition. Note that the use of a 429 device w/o GAMA will cause the loss of the above asterisked labels. Some may be required for A1 certification. For example, label 326 changes the CDI scale for approach.
4.2.5 CDI CALIBRATION
Select the test page displaying CDI output calibration. Place the cursor on the alignment field by using the outer knob. Use the inner knob to adjust the CDI needle until it is centered. Once centered, turn the cursor off to complete the calibration process.
4.2.6 SELECTED COURSE CALIBRATION
Select the test page displaying the selected course input. Using an extremely accurate input source, input 150° to the GNC 300. The input course will indicate close to 150 and a “Calib?” field will appear in the lower right corner. Selecting the “Calib?” field will calibrate the GNC 300 to match the input source. Verify OBS operation by checking that the bearing displayed on the GNC 300 is within 2° of the selected bearing. Do this for every multiple of 30° around the OBS.
4.2.7 APPROACH SETTINGS
Select the Approach Settings Test Page. Move the cursor over the approach switch field to change the installation state.
The available options are:
Appr switch: Field | Description |
none | The approach switch is not present |
instld | The approach switch is installed |
NOTE: To verify the installation of the approach switch, the “instld” setting requires the approach switch to be pressed to confirm its presence. The following prompt is displayed in this case: “press appr switch to confirm” along with a “?” following “instld”. When the switch press is recognized the prompts are cleared and the “instld” setting is confirmed.
Av. Kit Install. Manual
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