Mountain Air Cargo started local passenger commuter Sunbird Airlines in 1979. Sunbird acquired this Beech 99 in 1981. Sunbird returned it to Beechcraft Acceptance in 1985 (after Mountain Air sold the division in 1983 to Atlanta Express Airlines). Mountain Air leased N994SB 1986 - 90 before going to Exec Express Airlines (1990 - 91 (N175EE). Other operators include L'Express, Waglisla Airlines, Gulfstream International Airlines and Corporate Air. It's current with Bemidji Airlines since 2004 at the time of uploading.