Manual Number 9019161
Revision A, September 9, 2020
28
SECTION 5
CONFORMANCE
INSTRUCTIONS FOR CONTINUED AIRWORTHINESS
5.1.1 PRESSURE SYSTEM VERIFICATION
If the MD23 is configured to accept and display data associated with a static, pitot, or other
pressure source, some aviation regulations may apply to inspect and test for accuracy on a
regular basis. (for example, 14 CFR §91.411 for altimeters) If the CID for the MD23 is
designed specifically for this or similar function, identify appropriate maintenance in the pilot
operating handbook or flight manual supplement. Corresponding actions of how to perform
the appropriate maintenance can be found in the applicable User Guide associated with the
loaded CID.
5.1.2 COMPONENT MAINTENANCE AND REPAIR
No periodic scheduled maintenance or calibration is necessary for continued airworthiness
of the MD23 Custom Function Display, unless identified in the specific User Guide
associated with the loaded CID.
The unit display can be cleaned using a lint-free cloth moistened with water. No chemicals
should be used to clean the display.
If the unit fails to perform to specifications, the unit must be removed and serviced by Mid-
Continent Instruments and Avionics or their authorized designee. Other than software
version updates, there are no repairable parts or processes available to be performed in the
field.
5.1.3 SOFTWARE UPDATES
Mid-Continent Instruments and Avionics will have, on occasion, the need to update the
software of the MD23 to maintain, improve and/or enhance functionality or performance of
the base operating software. Unless otherwise noted, these changes will not alter the
performance of the CID, either present on the unit or loaded at a future time.
Software updates are typically communicated to the public via Service Bulletins issued by
Mid-Continent Instruments and Avionics and can be found on the company website,
www.mcico.com.
Using the easy field-upgrade process (section 4.5.2), the unit does not have to be returned
to the factory. Below are general instructions on how to prepare the files for updating.
Please read through all instructions before beginning.
