Butler National Corporation Announces FAA Approved Replacement 2-inch Standby Altimeter and Attitude Indicator

*RVSM Standby Altimeter Fix and Attitude Indicator Replacement FAA Approved for Learjets*

NEW CENTURY, KANSAS, July 9, 2024 – Butler National Corporation (OTCQX: BUKS), a leading manufacturer and provider of support systems for commercial and military aircraft and a recognized provider of management services in the gaming industry, announces the issuance of a Federal Aviation Administration (“FAA”) Supplemental Type Certificate (“STC”) approval of a replacement 2-inch standby altimeter and separate standby attitude indicator into the Learjet Model 24, 24B/D/E/F, 25, 25B/C/D/F, 28, 29, 31, 31A, 35, 35A, C-21A, 36, 36A, 55, 55B, 55C and 60 airplanes.

The FAA STC approval, STC Number ST00138DE authorizes the replacement of either or both of the 2-inch standby altimeter or 2-inch standby attitude indicator installed in most legacy Learjet airplanes. The Avcon/Butler Avionics installation package and kit replaces the 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.” Mr. 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.”

“Customers can cost-effectively install our 2-inch digital attitude indicator and altimeter in their aircraft. In most installations, there’s no need to cut the panel and minimal bus or wiring change is required,” said Van Winter, Vice President of Marketing and Aftermarket Sales. “This upgrade is a great, modern addition to the cockpit, providing smooth, high-resolution graphics and advanced functionality.”

Our Business:

Butler National Corporation operates in the Aerospace and Professional Services business segments. The Aerospace Products segment includes the manufacture, sale and service of electronic equipment and modifications to aircraft structures and electrical systems to support special mission and commercial aviation operations. Additionally, we operate two Federal Aviation Administration (“FAA”) Repair Stations. Butler National companies, Avcon Industries, Inc. and Butler Avionics, Inc. concentrate on enhancements to Learjet, Beechcraft King Air, Cessna Caravan, Gulfstream, and other turbine powered aircraft.  Butler National-Tempe designs and manufactures robust electronic controls and cabling. The Professional Services segment includes the management of a gaming and the related dining and entertainment facility in Dodge City, Kansas. Boot Hill Casino and Resort features approximately 500 slot machines, 16 table games and a DraftKings branded sportsbook. 

Forward-Looking Information:

Statements made in this report, other reports and proxy statements filed with the Securities and Exchange Commission, communications to stockholders, press releases, and oral statements made by representatives of the Company that are not historical in nature, or that state the Company or management intentions, hopes, beliefs, expectations or predictions of the future, may constitute “forward-looking statements” within the meaning of Section 21E of the Securities and Exchange Act of 1934, as amended (the “Exchange Act”). Forward-looking statements can often be identified by the use of forward-looking terminology, such as “could,” “should,” “will,” “intended,” “continue,” “believe,” “may,” “expect,” “hope,” “anticipate,” “goal,” “forecast,” “plan,” “guidance” or “estimate” or the negative of these words, variations thereof or similar expressions. Forward-looking statements are not guarantees of future performance or results. They involve risks, uncertainties, and assumptions. It is important to note that any such performance and actual results, financial condition or business, could differ materially from those expressed in such forward-looking statements.

Factors that could cause or contribute to such differences include, but are not limited to, those discussed in Item 1A of the Company’s Annual Report on Form 10-K, incorporated herein by reference. Risk Factors and elsewhere herein or in other reports filed with the SEC. Other unforeseen factors not identified herein could also have such an effect. We undertake no obligation to update or revise forward-looking statements to reflect changed assumptions, the occurrence of unanticipated events or changes in future operating results, financial condition or business over time.

About Mid-Continent Instruments and Avionics:

Mid-Continent Instruments and Avionics manufactures, overhauls and repairs aircraft instruments, avionics and advanced power solutions for the global aerospace industry. 

Mid-Continent supports general, business and commercial aviation, unmanned aerial vehicles (UAV), defense, and special missions markets. The company manufactures more than 25,000 units per year and processes more than 15,000 units in its overhaul, exchange and repair operation. The Quality Management System of the Wichita, Kansas Manufacturing Facility 

is AS9100D and ISO9001:2015 certified. For additional information, visit   

For more information, contact:

Patrick Hupp



Chris Reedy