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Section 2 INSTALLATION
2.1 General
Installation of the VHF communication transceiver and the battery box depends on the type of aircraft
and equipment involved, the instructions given in this section thus being only generally applicable.
2.2 Pre-instailation check
2.2.1 General
Prior to fitting the new system in the aircraft, the units must be checked according to the following
procedure to establish whether they have been damaged in transit.
2.2.2 Visual inspection
Prior to commissioning the equipment, carry out a visual inspection to establish any of the following
deficiencies.
1. Soilage, dents, scratches, corrosion, broken fasteners, damaged paintwork on enclosures and
parts thereof.
2. Soilage and scratches on the nameplate, front panel and markings.
3. Soilage, bends or broken-off pins, cracked plug and socket inserts.
4. Soilage and mechanical damage to rotary switches, LCD elements, knobs and pushbutton.
2.3 Mechanical installation
2.3.1 Mechanical installation VHF transceiver
The VHF transceiver is designed for incorporating in an aircraft instrument panel in behind panel
installation. The circular cutout and the fastener holes must be drilled in accordance with the standard
for small size instruments. Location must be min. 30 cm away from the magnetic compass of the
aircraft to avoid the compass being affected by the transceiver. Dimensional requirements are shown
in Fig. 2-4. Four DUZ fasteners (supply) are used to secure the unit.
2.3.2 Mechanical installation of a temperature sensor
The VHF transceiver permits indication of temperatures in the range - 20° C to +100° C with the aid
of an integral measuring circuit and a connected remote temperature sensor. The latter is located in
accordance with the particular requirements and local conditions. The wiring can be seen from Fig. 2-5.
Only use shielded flexed leads, noting the color coding of the connecting cables. The red lead must
be connected to J 3101/8, the blue lead to J 3101/2. The shielding must be connected to pin 4 of
J 3101.
AR 3201 - ( )
DV 28110.03/.04 Issue 04/92 Page 2-1