This Learjet Model 24 stability training, demonstration, and research aircraft, seen on the cover of the May 3, 1982 issue, passed over the Mount Whitney area of the Sierra Nevadas in California ...
[Avionics Today 09-12-2016] The FAA has awarded a Supplemental Type Certificate (STC) to Butler National to install an ADS-B In avionics solution into Learjet Model 24, 25, 28, 29, 31, 31A, 35, 35A, C ...