Nstallation; Installation Overview; Materials Required - Garmin GNS 480 Installation Manual

2 I

NSTALLATION

This section describes the installation of the GNS 480 including mounting, wiring, and connections. Post-
Installation configuration and checkout procedures are included in section 3.
2.1 P -I
RE NSTALLATION
Always follow acceptable avionics installation practices per FAA Advisory Circulars (AC) 43.13-1B,
43.13-2A, or later FAA approved revisions of these documents.
Follow the installation procedure in this section as it is presented for a successful installation. Read the
entire section before beginning the procedure. Prior to installation, consider the structural integrity of the
GNS 480 installation as defined in AC 43.13-2A, Chapter 1. Perform the post installation checkout
before closing the work area in case problems occur.
Complete an electrical load analysis in accordance with AC 43.13-1B, Chapter 11, on the aircraft prior to
starting modification to ensure aircraft has the ability to carry the GNS 480 load. Refer to Section 2.11
for the power consumption of each GNS 480 mode of operation. Document the results of the electrical
load analysis on FAA Form 337.
The WAAS/GPS installation instructions have been prepared to meet the guidance material defined in
AC20-138A Final Draft Airworthiness Approval of Global Navigation Satellite System (GNSS)
Equipment. The communications installation instructions have been prepared to meet the guidance
material defined by AC 20-67B Airborne VHF Communications Equipment Installations.
2.2 I
NSTALLATION
A successful installation should start with careful planning, including determination of mounting location
for the GNS 480, cable routing, and other required modifications. Once the mounting location has been
determined, prepare the mounting tube for installation. It may be easier to complete the wiring harness
and attach the connectors to rear connector plate before attaching it to the mounting tube.
Carefully plan which external devices will be connected to the GNS 480 inputs.
2.3 M
ATERIALS
2.3.1 M
ATERIALS
The GNS 480 is intended for use with standard aviation accessories. The following items are required for
the installation, but not supplied:
•
Wire (MIL-W-22759/16 or equivalent)
•
Shielded wire (MIL-C-27500 or equivalent)
•
Mounting screws (8 min. - AN507 6-32 screw with 100º countersink,)
•
Circuit breakers
•
Antennas (other than the A-33 GPS antenna supplied in the kit)
•
Tie wraps or lacing cord
•
Ring terminals (for grounding)
GNS 480 (CNX80) Installation Manual560-0982-01 Rev A
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NFORMATION
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Installation Procedures
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