Rev. D January 27, 2020
13
Manual Number 9018252
3.4
MOUNTING
Refer to Section 2: Pre-Installation Considerations in regards to equipment location.
The MD41 ACU is designed for rear panel mounting only. A cutout should be made in the panel in
accordance with Figure 4 for the unit bezel and two mounting holes. A cutout template is available from
Mid-Continent Instruments and Avionics (reference p/n 8014474) upon request.
Prior to completing the mounting of the unit in the aircraft, make sure to set the Annunciator Dim
Adjustment if automatic dimming is configured for the annunciations. Ideally this procedure is best
performed in a dark cockpit to simulate low-light/night time conditions. Connect the unit to the cable
harness and turn on master power to the instrument panel and lighting bus. Use a small flat-bladed
screwdriver to access the adjustment screw inside the hole on the bottom of the unit (see Figure 4).
Adjust the screw to increase or decrease the annunciator lighting brightness to a level appropriate with
the rest of the panel instrument lighting.
Secure the indicator to the panel with two #4-40 x 3/8 flat head phillips screws.
2.75
2.25
0.80
R0.16 typ.
2.50
3.00
0.13
Text Direction
2X 4-40 UNC-2B
3/8" max thread depth
Momentary Switch
FIGURE 6
OUTLINE DRAWING MD41-1817