The children of a 75-year-old woman who died from injuries she allegedly sustained while riding on a monorail at Tampa International Airport have filed a lawsuit against the airport and the county aviation authority. Adele Simpson fractured her hip in December 1999 when a monorail that transports passengers from the airport-parking garage to the main terminal suddenly accelerated causing its riders to fall. According to the suit, Simpson suffered from bleeding ulcers and required numerous surgeries after the accident. She died in August 2001.