Avcon wins FAA STC for Honeywell MKV-A EGPWS on Learjet, Bombardier jets
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Olathe, Kansas – October 13, 2026 -- Avcon Industries, a subsidiary of Butler National Corporation (OTCQX: BUKS), has received FAA Supplemental Type Certificate No. ST12439CH to replace Honeywell Aerospace Mark V EGPWS computers with the MKV-A unit across nine Learjet and Bombardier models.
STC covers Learjet 40/45 and 60 and seven Bombardier variants
The Approved Models List STC applies to the Learjet Models 40/45 and 60. It also covers the Bombardier CL-600-1A11 (600), CL-600-2A12 (601), three CL-600-2B16 variants (601-3A, 601-3R and 604), BD-700-1A10 and BD-700-1A11.
The installation uses existing avionics racks and is designed to minimize installation effort. Honeywell is phasing out the Mark V, and the MKV-A is offered as a drop-in replacement with options to upgrade capabilities later.