Turkish Airlines has selected International Aero Engines to power a batch of Airbus A321 aircraft.
The Istanbul-based airline recently firmed options on 10 A321s.
Turkish Airlines' Airbus narrowbody fleet is already extensively fitted with IAE's V2500 powerplant.
The aero engine manufacturer says it will deliver 10 engines to the carrier in 2013.
IAE values the follow-on agreement at up to $200 million. It says the deal marks the fourth time Turkish Airlines has picked IAE engines.