Interesting "sporty" -21 series (fuselage of the -10 series, wings & engines of the larger -30 series which was very effective at Perris' 1554x15m Rwy. Only 10 were built, and all started life with SAS Scandinavian. This one was delivered 05/1969 as SE-DBO, later OY-KIC.
In '95 it got its N- reg applied when bought by Spirit.
7 months later it went to Valujet, Allegiant Air in'98 were it received its current blue sheetline. It survived Victorville being purchased by Perris Valley Skydiving and was certified as a commercial skydiving platform in December 2006. It is now stored engineless, probably due to high operational costs.