A TUI Airlines Belgium Boeing 737-800, registration OO-TUP performing flight TB-3313 from Brussels (Belgium) to Eskisehir (Turkey), was climbing out of Brussels' runway 01 when the crew stopped the climb at FL190 reporting problems with the left hand engine (CFM56). The aircraft continued in the direction towards Turkey for about 20 minutes, then turned around and landed safely back on Brussels' runway 07L about 65 minutes after departure.
A replacement Boeing 737-800 registration OO-JEF reached Eskisehir with a delay of 6.5 hours.
The occurrence aircraft is still on the ground about 9 hours after landing.