GPS 155XL/GNC 300XL Installation Manual
P/N 190-00067-22 Rev E Page 2-4
2.6
MINIMUM INSTALLATION REQUIREMENTS
The following is a list of required devices for A1 and A2 certification. For a specific list of equipment used in the
initial STC, see GPN 190-00067-26 for the GPS 155XL and GPN 190-00067-36 for the GNC 300XL. Deviations
from this equipment should be approved by the FAA or the governing organization.
•
Pressure Altitude Device—This device delivers pressure altitude data to the GPS 155XL/GNC 300XL. This data
comes from an encoder or altitude data digitizer.
•
Manual Course Device—This device delivers the manual course selected to the GPS 155XL/GNC 300XL.
Course information can come from an analog resolver or from an EFIS via the ARINC 429 bus.
•
HSI/CDI Device—This device displays Nav Flag, Left/Right, and To/From information. This can be displayed
on the EFIS, HSI or CDI.
•
External Annunciators and Switches:
NAV
Annunciator
GPS
Annunciator
NAV/GPS
Switch
HOLD
Annunciator
AUTO
Annunciator
GPS Sequence
Switch
Approach Active
Annunciator (not required for A2)
Approach Arm
Annunciator (not required for A2)
GPS Approach
Switch (not required for A2)
Message
Annunciator
Arrival
Annunciator
The installer is advised to ensure that the switches and annunciators are the functional equivalent to and perform
at least as well as the GARMIN devices used in the initial STC. The GARMIN switches and annunciators are
sunlight readable and in the primary view of the pilot. Figure 2-2 shows what the GARMIN switch/annunciators
look like. For other information concerning switch/annunciators see the Generic Airplane Flight Manual
Supplement (GPN 190-00067-24 for the GPS 155XL and GPN 190-00067-34 for the GNC 300XL) as well as
current FAA directives.
•
Qualified GPS Antenna—This antenna must be one of those listed in the accessories list.
