FSG 90 System
3 Installation
18
FAV_D10024
December 2014
3.5 Mechanical Installation
3.5.1 Transceiver installation
Any radio installation into an aircraft shall be coordinated with both the licensed
inspector who certifies the installation, and with the aircraft manufacturer's installation
instructions.
Certifying the aircraft installation may be subject to specific National Regulations.
FSG 90(X)
VHF/AM transceivers are designed to be installed into the instrument panel
or operating console from its rear side into a standard 2¼ in. / 58 mm diameter panel
opening. Dimensions and positioning of the 4 fixing holes refer to Figure 3-4.
Select a radio location distant to heat sources. All equipment controls shall be readily
accessible from the pilot's normal seated position. The appropriate operator/crew
member(s) shall have an unobstructed view of the display when in the normal seated
position.
Leave sufficient room (at least 230 mm / 9 in.) behind the front panel for wiring
accommodation. Fixing of the transceiver is achieved by use of four (4) cross recessed
Pan head screws M 4 x 12 mm (supplied). These screws are sufficient for panel
thickness between 2 mm and 5 mm (1/16 in. …3/16 in).
3.5.2 Compass deviation
Compass deviation caused by
FSG 90
is less than 30 cm for 1° deflection.
(Category Z in accordance with EUROCAE ED-14C / RTCA DO-160C environmental
test conditions).
Compass Deviation
Distance
0.5°
13 cm/5.1 in.
1.0°
10 cm/3.9 in.
1.5°
9.25 cm/3.7 in.
2.0°
9.0 cm/3.6 in.
2.5°
8.25 cm/3.3 in.
3.0°
7.5 cm/3 in.
0
1 2
5
10
13
0.5
1.0
1.5
2.0
2.5
3.0
x
x
x
x
x
x
Distance
[cm]
Compass
Deviation
[ ° ]
Fig. 3-3:
Deviation of a compass by an operating
FSG 90
,
depends on the distance
between compass centre and contour of transceiver
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