CHATTANOOGA, Tenn. (WDEF) – A Chattanooga man says his wife and he had a terrifying experience on a Delta flight last week. Audio from air traffic control shows the pilot of Flight DL 1929 from Atlanta to Monterey, Mexico last Friday, January 19 at 10:30 a.m. telling traffic controllers, “Mayday! Mayday! We have blown a right engine!”