Turkish Airlines is to exercise options on three Airbus A330-300s, days after deciding to convert options on a batch of Boeing 777-300ERs.
The Star Alliance carrier says the aircraft will be delivered in 2015-16, following the firming of the order.
It ordered 15 of the type in October last year and added another pair in February this year.
While its current A330-300s are fitted with Rolls-Royce Trent 700 powerplants, it selected the General Electric CF6s for the subsequent order.
Turkish Airlines has not disclosed an engine selection for the three latest A330s.