article_snippet.sent: (CNN)An Alaska Airlines flight was forced to make an emergency landing Monday after CNN)An Alaska Airlines flight pilot reported hearing unusual banging.
article_snippet.sent: Flight 448, which had been bound for Los Angeles, returned to Seattle.
article_snippet.sent: A total of 170 passengers and six crew members were on Flight 448.
article_snippet.sent: After returning to Seattle, the aircraft took off again, arriving in Los Angeles on Monday evening.