No Highway in the Sky

No Highway in the Sky aka No Highway is a 1951 British blackandwhite disaster film from 20th Century Fox, produced by Louis D. Lighton, directed by Henry Koster, and starring James Stewart and Marlene Dietrich, Glynis Johns, and Jack Hawkins. The film is based on the novel No Highway by Nevil Shute and was one of the first films that depicted a potential aviation disaster involving metal fatigue.

Teasdale and Reindeer flight attendant Marjorie Corder Glynis Johns both take a liking to Honey and Elspeth, who they discover is lonely and isolated from her schoolmates. Teasdale speaks to Honeys superiors on his behalf, claiming she believes in him. Corder, meanwhile, has stayed on with Honey and his daughter as a nurse. Having now observed Honeys many qualities beyond his minor eccentricities, and after becoming very close to Elspeth, she decides to make the arrangement permanent by marrying the scientist.During a hearing in which his sanity is questioned, Honey angrily protests, refusing to be railroaded. He resigns and walks out, threatening to collapse other Rutland Reindeers until all the aircraft are grounded. He then goes back to his laboratory to prove his metal fatigue theory is sound, but the time he predicted for the structural failure soon passes without anything happening. The Reindeer airliner he disabled at Gander, however, is repaired, and shortly after it completes a test flight, the tail falls off while taxiing. Shortly thereafter, the same thing happens to the tail frame in the laboratory, and Honey discovers that he failed to include temperature as a variable factor in his fatigue calculations. ........

Source: Wikipedia