sentences:  Sierra Pacific also previously operated scheduled passenger service in the western U.S. with prop and turboprop aircraft.The airline was initially founded as Trans Sierra Airlines in 1970 by Chris Condon and Allan Silliphant with profits from their box office hit soft X and later R rated 3-D film The Stewardesses.It was renamed Sierra Pacific Airlines when the FAA granted permission to operate aircraft weighing over 12,500 lbs.