Cone of Silence is a 1960 British drama film directed by Charles Frend and starring Michael Craig, Peter Cushing and Bernard Lee. The film is about the investigation into a series of crashes involving the fictional Atlas Aviation Phoenix jetliner. Cone of Silence is loosely based on the 1952 crash in Rome and investigations into the structural integrity of the de Havilland Comet.The film was based on David Beatys novel, Cone of Silence 1959, later renamed Trouble in the Sky, the title of the film, as released in the United States.
Gort is reprimanded but is allowed to return to flying the Phoenix after a check flight under Captain Hugh Dallas Michael Craig. Meanwhile, Gorts daughter Charlotte Elizabeth Seal refuses to believe he is at fault. Gorts flying skills are again called into question when an approach to Calcutta is apparently made dangerously low, causing the aircraft to hit a hedge just before the runway threshold. It is later discovered that there was no hedge at the threshold of the Calcutta runway, and that the piece of hedge wrapped round the undercarriage leg had actually come from Ranjibad, where the aircraft had been taken off by Captain Clive Judd Peter Cushing this shows that Gort is not the only pilot to have problems taking off.Gort is later involved in a second crash, this time killing all on board. The crash is remarkably similar to the first both involve a fully loaded aircraft on a hot night, taking off under Captain Gort from the same runway at Ranjibad airport. Dallas eventually discovers that the aircrafts designer had deliberately withheld information on potential takeoff difficulties in hot conditions. A third crash is avoided by seconds when a crew about to take off are contacted by Air Traffic Control, and told to add eight knots to all unstick speed and keep the nosewheel on the ground until just before unstick speed is reached. ........
Source: Wikipedia