The Stewardesses

The Stewardesses is a 1969 softcore, later Rrated, theatrical 3D film produced, directed and written by Allan Silliphant and starring Christina Hart, Monica Gayle, Paula Erickson, and Donna Stanley.

A single eventful night in the lives of a crew of Los Angelesbased, transPacific stewardesses. The leading character is killed in a 30story suicide leap, and the others simply party, using drugs and engaging in various sexual encounters. One of the girls befriends and beds a returning Vietnam combat soldier.The film was a 35mm 3D softsex, skinflick with minimal production value during the first months of distribution. Since it was grossing extremely well, in specialty adult theaters, Louis Sher and Silliphant decided to repackage their 3D specialty hit into a regular Rrated, general release 3D feature film, with a more complex, conventional storyline with reduced nudity and simulated sex activity. ........

Source: Wikipedia