30 August 2103
Delta flight 1186 , Boeing 757-200 from Atlanta to Jacksonville took off from Atlanta and was climbing at around 10000 feet when the crew tried to retract the flaps and received a flaps warning indication.The crew advised the tower and after entered a hold at 6000 feet for work with checklists landed safely back to Atlanta airport
Atlanta airport
Source
http://flightaware.com/live/flight/DAL1186/history/20130830/1457Z/KATL/KJAX