The EASA STC approval of STC No. ST00235MC authorizes the replacement of the existing OEM-installed clocks with the Avcon Industries, Inc./Butler Avionics, Inc. designed installation of the Mid-Continent Instruments and Avionics CH93 Series CHRONOS® Digital Clocks with USB Chargers. The installation fits within the same panel location and requires only circuit breaker and wiring changes.
