Zero Hour!(1957) -

: Many famous lines from Airplane! , such as the technical flight instructions, were originally delivered with complete sincerity in Zero Hour! . Key Production Details Letters from our February 2020 issue - AOPA

While intended as a serious drama, the film's "classically structured" plot and intense dialogue eventually became the foundation for Airplane! . Zero Hour!(1957)

The screenplay was written by Arthur Hailey, Hall Bartlett, and John Champion, based on Hailey's 1956 television play Flight into Danger . : Many famous lines from Airplane