Formed in 1965, Harrisburg Commuter Airlines had changed their name to Pennsylvania Commuter Airlines (in 1968) and became an Allegheny Commuter carrier (in 1973) when they took delivery of this Beech 99 in October 1974. Pictured after the name was shortened to Pennsylvania Airlines (in 1980), N133CA was sold to Short Brothers in 1983 as Short SD3-60s were added to the airline's fleet. Later registered N163HA and C-FCBU, the aircraft was leased by Alpine Air Express in 1991. Buying the aircraft in 1993 ,the registration was changed to N950AA and is current at the time of uploading.