December 2017

Butler Avionics, Inc, a subsidiary of Butler National Corporation (OTC QB: BUKS), a leader in aircraft special mission and avionics modifications, engineering, integration, manufacturing and gaming industry service management, announces European Aviation Safety Agency (“EASA”) Supplemental Type Certificate (“STC”) approval of the Butler National Garmin GPS / Navigation / Communication Navigator GTN 750/650/725/625 installation in the Learjet Model 35, 35A, 36, 36A and Model 24/25 Series aircraft.

Butler Avionics, Inc, a subsidiary of Butler National Corporation (OTC QB: BUKS), a leader in aircraft special mission and avionics modifications, engineering integration, manufacturing, and gaming industry service management, announces European Aviation Safety Agency (“EASA”) Supplemental Type Certificate (“STC”) approval of the Butler National ADS-B(Out) avionics solution in the Learjet Model 35, 35A, 36, 36A and Lear 60.