Mayday at 40,000 Feet!

When a Federal Marshal becomes ill on a flight from Salt Lake City to Chicago, his prisoner seizes the Marshal's gun. In the ensuing struggle, the Marshal is killed; the pilot and several passengers are injured; and the plane is dangerously crippled when a bullet punctures the hydraulic system. Now the lives of everybody aboard depend on the untried skill of the plane's copilot to land the damaged airliner.