Equipment Mounting - Garmin MX20 Installation Manual

Up: 20 degrees off pilot's eye center line
Down: 30 degrees off pilot's eye center line
Right: 50 degrees off pilot's eye center line
Left: 50 degrees off pilot's eye center line

2.4 Equipment Mounting

Once the cable assemblies have been made, attach each connector to the rear connector mounting plate
and the mounting tube as illustrated in Figure 2-7. Route the wiring bundle as appropriate.
Use tie wraps to secure the cable to the rear connector plate to provide strain relief for the cable assembly
as shown in View A of Figure 2-7. Connect the shield grounds directly to the grounding lug.
Mounting Tube
Secure the mounting tube to the instrument panel structure using the sixteen screws. The AN507 6-32
screws have a 100° countersunk head. The mating holes in the instrument panel structure must also be
countersunk to accept the screw head so that the screw head is flush with the inside surface of the
mounting tube.
Failure to properly countersink the mounting holes will result in damage to the MX20.
Mounting screw heads must not protrude into the mounting tube.
The mounting tube should be flush to the instrument panel and allow sufficient clearance for the back of the
bezel of the MX20 to mount flush to the mounting tube. Sufficient clearance must exist in the instrument
panel opening to allow ease of insertion and removal of the MX20.
If the back of the MX20 bezel does not mount flush to the mounting tube, the connector may
not engage fully.
An alternate mounting configuration can be accomplished using locally-fabricated L brackets. Make the
brackets from 20-24 T3 aluminum, 0.040", and form a 90
mounting tube, screw heads must not protrude into the mounting tube.
Once the cable assemblies are complete and the connectors are attached to the mounting frame, install the
mounting frame assembly in the instrument panel. Be sure to use AN507 flat head screws so the unit will
slide in and out freely. Attach the front of the mounting frame to the instrument panel. Use support
brackets to attach the rear of the frame to the aircraft. Cable wiring to the mounting frame is shown in
Figure 2-7.
Slide the unit into the frame and hand-tighten the threaded screw shaft using the 3/32" hex driver provided in
the installation package. The unit will be pulled into the frame by the shaft and the connectors will fully engage.
The back of the bezel must only be flush to the mounting tube.
To remove the unit from the mounting frame, unscrew the screw shaft. The unit will be loosened and then
may be pulled from the frame. No special extraction tools are required.
MX20 Installation Manual
CAUTION
CAUTION
o
bend. When attaching the L brackets to the
Installation
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