Pendik-Sulzer was the closest we have got in proper engine development, either say it was massacred by officials in 1999 - and later in 2000s by officials, it could have been revived in nearby future and it would provide at least the culture of engine production which would eventually lead to development of machinery for Turkish naval vessels in 2000s , and it is gone not revived.I mean no disrespect but can you at least correct me?
We didn't had a serious development on domestic ship engines since Pendik-Sulzer got closed
I remember reading writing of a retired navy engineer talking about infrastructures they earned to Turkey for Turkey to repair, maintain its own navy ships locally. He said that wanted Turkey to have in house capabilities for repairing, maintaining LM2500 engines.
However, as of i know both gas turbines and diesel engines, and transmissions are maintained by Turkish personnel, and as usually happens there are also foreigner technicians -especially on gas turbine- for several reasons.