Garmin GNS 530W Installation Manual page 105

5.4.6 AHRS / IRU Interface Check
The GNS 500W Series unit can receive heading data from an external source. This check verifies that the
GNS 500W Series unit is receiving data from these units. Ensure that the GNS 500W Series unit is
turned on and in configuration mode. If the following steps do not perform correctly, check the electrical
connections and configuration setup.
1. Go to the Main Inputs page.
If a Sandel EHSI or an ARINC 429 EFIS is also installed, ensure that it is turned off so
that it does not supply heading to the GNS 500W Series unit.
2. Verify that the HDG field displays valid heading data.
3. Remove power from the heading source and verify that the heading in the HDG field is dashed
out.
5.4.7 TAWS Audio Check (For Units With TAWS Only)
The audio panel should also be turned on for this test.
The TAWS audio volume has an initial default of 60% of the maximum volume value. The TAWS
volume needs to be set so as to ensure that aural alerts are audible under all anticipated noise
environmental conditions.
1. Select the configuration page labeled 'TAWS AUDIO CONFIG 1'.
2. Go to the PLAY MSG field. Rotate the small right knob to play the various TAWS audio
messages. There are a total of 16 audio clips. The 16 audio clips are the various TAWS system,
caution, and warning messages.
3. Select and play a number of the TAWS audio messages. Adjust the volume so the TAWS
messages are audible under all anticipated noise environmental conditions.
•
Evaluate the TAWS audio messages for acceptable volume and intelligibility during both
low and high cockpit noise levels (idle descent at low speed and high power at Vmo).
•
Adjust the TAWS audio volume by moving the cursor to the VOLUME field and rotating
small right knob. Turn the knob to the right to increase the volume and to the left to decrease
the volume.
500W Series Installation Manual
190-00357-02
NOTE
NOTE
Page 5-27
Rev. D