Mid-Continent Instruments and Avionics, Wichita, KS
REV. B, October 31, 2012
18
Manual Number 9017782
2.6
PITOT / STATIC CONNECTIONS
The connector kit supplied with the unit contains two (2) pneumatic quick disconnect fittings. These
fittings are specific to the connections on the rear of the unit and required for proper operation.
Aircraft tubing that connects to the unit must be ¼” OD with an approximate 0.17” ID. When
determining tubing length, be sure that it can extend through the cutout in the panel by approximately 8”
to allow the unit to be installed and removed from the front of the panel.
NOTE: It is helpful to identify/label each tube (pitot or static) so that it can be connected to
the correct port on the back of the unit during installation.
2.7
MOUNTING
The MD302 is designed primarily to be front mounted in an aircraft instrument panel. Refer to Section
2.5in regards to Equipment Location. To install the unit in the instrument panel, follow the instructions
below and refer to Figures 2.4, 2.5 and 2.6.
1)
Once a location is selected, cut the panel per the dimensions in Figure 2.5. Other notes to
consider for panel cutout: (the Nutplate can be used as a basic template for the panel cutout)
For vertical installation, rotate the panel cutout profile 90°.
Be sure to leave space clear on the front of the panel for the bezel of the unit, which will
extend significantly outside the main rectangular cutout.
The dimension of the smaller side of the rectangle is critical for a good finished appearance.
If it is too large, the cutout will be visible outside the unit bezel. The relationship of the holes
to the cutout should be maintained closely to ensure proper installation.
One countersink hole on either side of the rectangular cutout is required. Any of the three
hole locations is acceptable. More than one countersink hole one each side is optional.
Screws for these holes will retain the Nutplate and not support the weight of the unit.
Verify that a flathead screw will sit flush or below the panel surface in the countersink holes.
If not, deepen the countersinks slightly.
Remove burrs around the cutout and holes to allow the unit to mount flush with the panel.
2)
Install the Nutplate on the backside of the instrument panel using at least one (1) flathead screw
on each side of the rectangular cutout.
The Nutplate should mount flush to the backside of the instrument panel. The threaded nuts
in corners of the Nutplate should protrude to the rear.
3)
Route the prepared cable harness and pitot/static fittings from behind the panel and through the
panel cutout. The length of the cable harness should allow the unit to be connected in front of
the panel.
4)
VERIFY THAT AIRCRAFT POWER IS TURNED OFF.
5)
Connect the cable harness with configuration module and pitot/static fittings to the rear of the
unit.
6)
Insert the unit through the panel cutout and secure with four (4) hex cap screws provided.
Electrical bonding between the aircraft and the unit chassis is NOT required.
2.8
INSTALLATION COMPLETION
Prior to operating the unit in the aircraft, verify the basic operation of the unit and conduct a standard
leak check of the pitot/static system per the aircraft maintenance manual or industry practice. When
initially powering the unit, an error may occur if a pre-configured unit is being mated to a Configuration
Module for the first time or if the unit has yet to be configured. Acknowledge this error and either
proceed to configuring the installation settings or cycle the power. The error should not occur for
subsequent startups.
