uAvionix AV-30-E Installation Manual page 38

d. Screw thread length measured = 4.76mm (0.1875in screw)
e. Panel thickness measured = 2.29mm (0.090in panel)
f. Thread engagement = 6.76 – 2.29 = 2.47mm
i. This screw may NOT be used in the Top or Bottom
3) Note: Installing an AV-30 into panel cutouts where one of the 4
mounting hole locations has been enlarged for prior Baro Setting
knob, DG Adjustment knob, or Heading Bug knob clearance will
increase the mounting difficulty. Use extreme caution when using
reducing washers while adjusting screw engagement in these
locations. The reducing washers will flex more than traditional
washers causing the screws to have deeper engagement. You can
still use the installation tool in this case by turning the tool over and
aligning the Bottom depth gauge hole with the mounting hole while
'bridging' the tool across the opening to ensure it is flat on the back of
the panel as shown below. Insert your reducing washer and screw
and repeat the process from 1c above. Use caution when tightening
the screw.
Figure 9 - Bridging using back side of tool when working with enlarged holes and reducing washers.
UAV-1004234-001, AV-30-E Installation Manual
Rev H
Mounting holes since the length is too short. You will
need to use a longer screw or a longer screw with
shims/washers.
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