Mayday at 40,000 Feet! (1977)

The co-pilot and engineer of a passenger jet struggle to keep the plane airborne after a marshal onboard, transporting a murderer to prison, has a heart attack and the killer uses his gun to shoot the captain and blow out the hydraulics.

Directed by: Robert Butler

Starring: David Janssen, Don Meredith, Christopher George, Ray Milland, Lynda Day George, Margaret Blye

Links: IMDb, Movie posters, Movie stills