 - Revenue increased 4 to 19.3 million for the second quarter resulting in quarterly earnings of three cents per share - OLATHE, Kan. , Dec. 15, 2022 PRNewswire -- Butler National Corporation OTCQB: BUKS, a leader in the growing global market for aircraft modification, maintenance, repair and overhaul MRO and a recognized provider of gaming management services, announces its financial results for the second quarter fiscal 2023 ended October 31, 2022. 