Butler National Corporation Announces FAA Approved STC for Replacement Clock with USB Chargers in Learjets

**Crew USB Charging made available with Mid-Continent Instruments and Avionics CHRONOS® Digital Clock **

NEW CENTURY, KANSAS, June 12, 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 clock that includes USB-A and USB-C chargers into the Learjet Model 24, 24B/D/E/F, 25, 25B/C/D/F, 28, 29, 31, 31A, 35, 35A, C21A, 36, 36A, 55, 55B, 55C, 60 and 60XR airplanes.

The FAA STC approval, 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.

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 this very desired USB charging capability in the cockpit. Butler/Avcon has designed this retrofit installation to minimize customer impact and down time. Mr. Reedy added, “We received interests and requests to provide the new USB charging capabilities for the flight crew. CHRONOS mechanically installs the same as the existing clock. Butler Avionics will make STC kits available for field installation of the clock with USB chargers. The STC is presently applicable to legacy Learjets and the extension of the applicability to other models will be gauged upon customer interest.”

“CHRONOS is a simple, drop-in replacement for most existing clocks,” said Van Winter, Director of Aftermarket Sales and Support for Mid-Continent Instruments and Avionics. “This cost-effective upgrade adds superior, FAA-approved functionality to the flight deck with minimal impact to the instrument panel.”

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

913-829-4606 Or

Chris Reedy 913-780-9595