Mid-Continent Instruments and Avionics, Wichita, KS
REV. B, October 31, 2012 21 Manual Number 9017782
SECTION 3 OPERATION
IMPORTANT: READ THIS ENTIRE SECTION PRIOR TO OPERATING THE UNIT
IN FLIGHT!
This section contains information on how to use and interpret the information presented to the pilot and
crew during normal and emergency operation of the MD302 Digital Flight Instrument.
3.1 USER INTERFACE
The MD302 Digital Flight Instrument is designed for simple, intuitive operation for ease of use
and quick interpretation of the information displayed.
The central control knob can be located at the bottom-center, middle-left or middle-right of the
unit bezel depending on the installation orientation. This is the only user interface device on the
unit.
The knob has two functions: push and turn.
The knob provides 16-detents per revolution and typically increments whatever element it
is controlling on the display one unit per detent.
The push function is typically used to select the highlighted option in menus and/or to
enter and exit menus and control functions. The push function can also perform certain
operations with a push-and-hold action as described herein.
3.2 PRE-FLIGHT MODE
In Pre-flight Mode, power is applied to the unit and the introduction screen appears during
startup with the information shown in Figure 3.1.
During Pre-flight Mode, the startup screen shown in Figure 3.1 will be displayed while the unit
conducts an initial power-up built-in test (PBIT) of the system to validate operational readiness.
This includes, among others, a battery capacity measurement, an internal checksum to verify
software and memory, and a check that the internal settings and identification of the unit match
the Configuration Module installed in the aircraft cable harness.
The startup screen will be displayed for approximately 5 seconds and will transition to Flight
Mode when complete.
manufacturer’s logo
model name/number
software version
total operating time
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