an138The Antonov An-38 is a stretched and upgraded version of Antonov's earlier An-28.It is a twin-engined turboprop transport aircraft, desned by the Antonov Desn Bureau in Kyiv,Micrel, Inc. AN-138 November 2006 2 M9999-111006-A Port Based Priority Port based priority is the simplest form of QoS. Each ingress port can be individually classified as one of