Installation Instructions

190-01007-A3 GTN 6XX/7XX AML STC Installation Manual
Rev. 4 Page 2-33
2.4.10.1.4 TAWS Annunciation (units with TAWS only)
Use the steps below to determine whether or not the integrated TAWS annunciations displayed on the
GTN unit to be installed is within the acceptable field of view as depicted in Figure 2-17.
1. Determine the pilot’s primary view centerline, as defined in Step 1 of Section 2.4.10.1.2.
2. Measure the horizontal distance from the primary view centerline to the left or right edge of the
GTN unit, as appropriate.
3. If the GTN unit is mounted to the right of the primary instruments, the internal display of
annunciation within the GTN is considered to be within the acceptable field-of-view if the
following criteria are met:
o The left edge of the GTN unit bezel is within 15.4 inches of the primary view centerline.
o The top edge of the GTN unit is no lower than the bottom edge of the primary flight
instruments or the unit is line abreast with the affected CDI.
4. If the GTN unit is mounted to the left of the primary instruments, the internal display of
annunciation within the GTN unit is considered to be within the acceptable field-of-view if the
following criteria are met:
o The right edge of the GTN unit bezel is within 11.5 inches of the primary view center line.
o The top edge of the GTN unit is no lower than the bottom edge of the primary flight
instruments or the unit is line abreast with the affected CDI.
If the internal display of TAWS annunciation within the GTN unit does not meet the criteria for
acceptable field-of-view as defined above, an external annunciator unit must be installed within 16.8
inches of the view centerline.
The external TAWS annunciator unit must contain, at a minimum, the following annunciations:
• PULL UP (terrain warning) – red
• TERR (terrain caution) – amber/yellow
• TER N/A (terrain not available) – amber/yellow
• TER INHB (terrain inhibited) – white
All annunciations must be within 16.8 inches of the view centerline.