Approval provides a replacement path for Mark V computers using existing avionics racks
OLATHE, Kan., Oct. 13, 2026 /PRNewswire/ -- Avcon Industries, Inc., a subsidiary of Butler National Corporation (OTCQX: BUKS), a leading manufacturer and systems integrator for special mission aircraft modifications, announces Federal Aviation Administration (FAA) Supplemental Type Certificate (STC) approval of the installation of the Honeywell Aerospace MKV-A Enhanced Ground Proximity Warning System (EGPWS).
Honeywell Aerospace is phasing out the landmark Mark V Enhanced Ground Proximity Warning System (EGPWS) and is making it easy for operators to upgrade to the next generation of terrain awareness and runway safety technology with the MKV-A. Offering higher resolution databases, enhanced safety & situational awareness, and resilience to GPS jamming & spoofing, the MKV-A continues with industry-leading enhancements to the EGPWS product line at Honeywell Aerospace. The MKV-A will be available as a drop-in replacement for the operator's existing MKV with options to upgrade capabilities down the road.
All equipment associated with the modification is anticipated to be sourced from Honeywell Aerospace. MKV-A EGPWS computers are available for shipment. STC licensing and FAA STC information is available from Avcon.
In 2000, the FAA mandated EGPWS or Terrain Awareness and Warning Systems (TAWS) equipment on turbine-powered airplanes that are configured to have six or more passenger seats. FAA regulations require all Bombardier and Learjet airplanes (Except certain Model 23/24 airframes) to have a TAWS or EGPWS system installed.
The FAA issued Avcon the Approved Models List (AML) STC No. ST12439CH that replaces the Honeywell Aerospace MKV EGPWS computer with the MKV-A computer in the Learjet Models 40/45 and 60 and the Bombardier Models CL-600-1A11 (600), CL-600-2A12 (601), CL-600-2B16 (601-3A Variant), CL-600-2B16 (601-3R Variant), CL-600-2B16 (604 Variant), BD-700-1A10, and BD-700-1A11. The installation uses existing avionics racks and is designed to minimize installation effort.
Avcon is in the process of applying for Transport Canada (TC), European Union Aviation Safety Agency (EASA), and United Kingdom Civil Aviation Authority (CAA) validation/approval of the FAA STC.
"Avcon is committed to supporting customers with FAA-approved solutions to obsolescence," said Marcus Abendroth, President of Avcon. "We appreciate the cooperation with Honeywell Aerospace to achieve the STC result. The form, fit and functional MKV-A replacement should minimize the replacement effort. Operators may accomplish this modification at our New Century, Kansas facility or at the operator's qualified avionics modification center." Added Mr. Abendroth.
For more information about Avcon's STC for the MKV-A EGPWS computer upgrade, please contact sales@avconindustries.comor call us at (913) 780-8595.
For more information about the Honeywell Aerospace MKV-A EGPWS, please visit:
https://www.honeywellaerospace.com/us/en/pages/mark-v-a-egpws-enhanced-ground-proximity-warning-system
Avcon Industries Business:
Avcon Industries, Inc. operates in the Aerospace business and focuses on the modification of business and commercial aircraft, which includes both complex structural modifications and system integrations. Avcon specializes in providing products and services to the business marketplace, the forestry and atmospheric research space, the Intelligence, Surveillance and Reconnaissance (ISR) sector, and the air ambulance segment.
Avcon is recognized for providing solutions to regulatory-driven aircraft modifications.
Avcon Industries, Inc. is a wholly owned subsidiary of Butler National Corporation. Butler National Corporation is a publicly traded stock company with ticker symbol: OTCQX: BUKS.
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Please review www.avconindustries.com for pictures of our products and details about Avcon Industries, Inc.
FOR MORE INFORMATION, CONTACT:
Marcus Abendroth
sales@butlernational.com
Ph: (913) 780-9595
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SOURCE Avcon Industries, Inc.
