Extract the answer to the following question from the movie plot. If the question isn't answerable, please output "Can't answer". Question: Why did Hughes aircraft crash? Title: The Aviator Movie plot: In Houston, 1913, nine-year-old Howard Hughes is warned by his mother of the diseases to which she is afraid he will succumb. Fourteen years later, he begins to direct the movie Hell's Angels. However, after the release of The Jazz Singer, the first partially talking film, Hughes becomes obsessed with shooting his film realistically, and decides to convert the movie to a sound film. Despite the film being a hit, Hughes remains unsatisfied with the end result and orders the film to be recut after its Hollywood premiere. He becomes romantically involved with actress Katharine Hepburn, who helps to ease the symptoms of his worsening obsessive-compulsive disorder (OCD). In 1935, Hughes test flies the H-1 Racer, pushing it to a new speed record. Three years later, he breaks the world record by flying around the world in four days. He subsequently purchases majority interest in Transcontinental & Western Air, aggravating Juan Trippe, company rival and chairman of Pan American World Airways (Pan Am). Trippe gets his friend, Senator Owen Brewster, to introduce the Community Airline Bill, giving Pan Am exclusivity on international air travel. As Hughes' fame grows, he is linked to various starlets, causing a jealous Hepburn to break up with him following her announcement that she has fallen in love with fellow actor Spencer Tracy. Hughes quickly finds a new love interest with 15-year-old Faith Domergue, and later actress Ava Gardner. Hughes secures a contract with the Army Air Forces for two projects: a spy aircraft and a troop transport unit. In 1946, with the "Spruce Goose" flying boat still in construction, Hughes finishes the XF-11 reconnaissance aircraft and takes it for a test flight. However, one of the engines fails midflight, and the aircraft crashes in Beverly Hills, with Hughes getting severely injured. With the end of WWII, the army cancels its order for the H-4 Hercules, although Hughes still continues the development with his own money. When he is discharged, he is informed that he must choose...
Answer:
one of the engines fails midflight