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Page 1-4 G3X Installation Manual –Installation Overview
Revision A 190-01115-01
1.4.3 Physical Specifications
All width, height, and depth measurements are taken with unit rack (if applicable) and connectors.
Table 1-4. G3X LRU Physical Specifications
LRU Width Height
Depth
(GMU 44
Diameter,
including
flange*)
Unit Weight
Unit Weight
w/Nutplate
& Connector
Weight
GDU 370
6.04 inches
(153.4 mm)
7.83 inches
(198.8 mm)
3.41 inches
(86.7 mm)
1.6 lbs
(0.713 kg)
1.8 lbs
(0.803 kg)
GDU 375
6.04 inches
(153.4 mm)
7.83 inches
(198.8 mm)
3.41 inches
(86.7 mm)
1.7 lbs
(0.753 kg)
1.9 lbs
(0.843 kg)
GMU 44
N/A
2.10 inches
(5.33 cm)
*3.35 inches
(85.1 mm)
0.35 lbs.
(0.16 kg)
0.50 lbs.
(0.23 kg)
GSU 73
5.50 inches
(139.8 mm)
3.96 inches
(100.6 mm)
7.33 inches
(186.2 mm)
3.1 lbs
(1.41 kg)
3.5 lbs
(1.59 kg)
1.4.4 Cooling Requirements
While no forced cooling air is required for the G3X system, it is highly recommended that the air behind
the panel be kept moving (by ventilation or a fan).
• No cooling air is required for the GDU 37X
• No cooling air is required for the GMU 44
• No cooling air is required for the GSU 73, however the GSU 73 should be mounted in a location
that provides adequate airflow to comply with the maximum outer case temperature listed in
Section 4.
NOTE
Avoid installing the G3X LRUs near heat sources. If this is not possible, ensure that
additional cooling is provided. Allow adequate space for installation of cables and
connectors. The installer will supply and fabricate all of the cables. All wiring should be
in accordance with FAA AC 43.13-1B and AC 43.13-2A.