Non-Structural Mount Installation; Figure 3-25. Generic Non-Structural Arinc 743 Footprint Antenna Installation - Garmin GDU 37X Installation Manual

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3.6 Non-Structural Mount Installation

This section provides installation examples and considerations for non-structural mounting of teardrop and

ARINC 743 footprint antennas. Typical installations may be below a non-metallic glareshield, under the

composite or fabric skin, or on an external, non-structural surface. Other non-structural installations may

exist, but are not presented in this manual.

3.6.1

Generic Non-structural Antenna Installation

Figure 3-25 shows the generic non-structural installation for the ARINC 743 footprint (GA 55A/GA 57X)

antenna. The teardrop footprint antennas (GA55, GA56 stud mount) can also be installed in this manner.

For mounting the teardrop style antenna (GA 55 or GA56), a doubler plate similar to

Figure 3-4

P/N 115-00846-10 can be used with the mounting surface to support the antenna. Rivets used to secure the

doubler plate to the mounting surface are optional in a non-structural installation. Screws, washers, and

locking nuts as shown in

Figure

C-2.1,

Figure

C-2.2, and

Figure C-2.3

are required to secure the Teardrop

style antenna to the mounting surface. Torque the locking nuts to 12-15 in-lbs, torque should be applied

evenly across all mounting studs.

A doubler plate similar to

Figure

3-14, or P/N 115-00846-00 (ARINC 743 style) can be used with the

mounting surface to support the antenna. Rivets used to secure the doubler plate to the mounting surface

are optional in a non-structural installation. Locking nuts are required to secure the ARINC 743 antenna

(locking nuts installed on doubler). Torque the four supplied #10-32 stainless steel screws

(Garmin P/N: 211-60212-20, MS51958-67, or equivalent) evenly across all mounting screws.

190-01054-01

GDU 37X Installation Manual

Rev. D

Page 3-23

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