Replaces Legacy Standby Instruments

Butler National Corporation and Mid-Continent Instruments and Avionics have received an FAA Supplemental Type Certificate (STC) for a replacement 2-inch standby altimeter and a separate 2-inch standby attitude indicator for Learjet models 24, 24B/D/E/F, 25, 25B/C/D/F, 28, 29, 31, 31A, 35, 35A, C21A, 36, 36A, 55, 55B, 55C and 60 airplanes.

The STC authorizes replacement of either or both instruments installed in most legacy Learjets. The Butler replacement package replaces previously installed standby equipment with the Mid-Continent Instruments and Avionics MD23 2-inch Digital Counter Drum Encoding Altimeter and Attitude Indicator.

Christopher Reedy, President and Chief Executive Officer of Butler National Corporation said, “Butler is pleased to have worked with Mid-Continent Instruments and Avionics to offer the Learjet standby altimeter and standby attitude indicator replacement solutions. We have designed the retrofit installations to minimize customer impact and down time. The replacement digital altimeter conveniently replaces most existing two-inch standby altimeters.”

Reedy added “Our avionics technicians have noticed a growing number of operating challenges with existing RVSM standby altimeters when performing the required continued airworthiness checks. The replacement standby altimeter is a quality and cost-effective replacement solution that provides the RVSM standby functionality.

Similarly, the MD23 2-inch Digital Attitude Indicator provides a great looking LCD-display replacement for the aging mechanical standby attitude indicator.

Butler Avionics plans to make available the digital standby altimeter and standby attitude indicator STC packages with installation drawings to avionics shops for support installation worldwide.”

FMI:  www.mcico.com/