OK, I'll bite.
Turkey has successfully cast SCB(single crystal blades) in 2015 for the first time. And TÜBİTAK MAM has been developing the technology ever since. Recently, Mahmut Akşit said that they're using 3rd generation SCB for their turbine blades.
TÜBİTAK MAM has also developed TBC for TS1400 for the first time.
@TheInsider has said that the institution is developing double-layer thermal barrier coatings for the TFX engine program. Watch the video below.
The other components you mentioned are trivial. They can be outsourced or subcontracted to a local company to develop and the would certainly not take a decade to
I think the confusion comes from the one to one comparison with the other countries like China or India who had no prior knowledge or experience in the field and took on a major task of developing large turbines and failed at it for decades. TEI is not in the same situation. Go visit the section of capabilities on TEI's website. We are already a significant part of the western turbine engine ecosystem. We're already very good at cold sections of the engine and with T700, TS1400 and TF6000 we gained significant know-how and know-why about hot-sections. We have reached the maturity to develop a big turbine(or will reach with TF6000). I'm not saying it will be a piece of cake but it's within our reach, imo.
These are the parts that are produced by TEI for GEnx engine.
And these are for the LEAP engine, again, manufactured by TEI
We're not starting from scratch like the Chinese or Indians were.
That said, there are people who are much more knowledgeable about the subject than I am. We should hear what they have to say. Their opinions would carry much more weight.
@Nilgiri @Yasar
Yes TEI and GE collab is discussed in quite some detail in the propulsion thread at various places. Folks should really search and read things in there.
The capital machinery + process control for example that Turkiye has in the eskisehir facility is a big leg up to how completely non-NATO "newer entrant" ecosystems had to go about developing them or making do.
PRC got a number of fairly significant injections/absorptions on this from the western ecosystem (before tianenmen happened) during the 1980s relative detente/cooperation era of Deng (with western + Chinese cooperation to bring down the USSR).
But since then it has been very ITAR regulated (as relations have become more tense/fearful/mistrust with China's rise while it retains very non-liberal political structure that West dislikes) and the trend is tightening even more.
When I went to Chengdu for example to bring certain QC online at the pratt (JV) facility there (and this was before the Xi Jinping era when relations were far better than now), there are all kind of protocols made to stymie easy IP transfer/theft that west wants to hold closer to its chest. Its similar to the whole lithograph EUV + CHIPS act stuff playing out right now w.r.t semiconductors.
If you look at IP receipt transfers, you get larger (actual 3rd party transparent) basis for overall state of tech level differential.
China only recently broke into 10+ billion USD range (what it earns from its IP abroad)....and this is mostly based on 5G telecoms gear (i.e arguably long topic as to what was genuine RnD versus stolen/copied and in between).
For long time prior to 2016 (5G explosion), China earned about 1 billion per year in IP use abroad.
Compare to Turkiye for example where it earns 100 - 300 million dollar range here and Turkiye comes out very favourably in per capita basis (since PRC is like 17 times larger by population)
Whereas US for example earns consistently in the 100 - 125 billion USD range for the last 10 years or so.
Japan in the 25 - 50 billion USD range.
UK in 15 - 25 billion USD range.
Germany in the 15 - 60 billion USD range.
France in the 10 - 15 billion USD range.
Even Canada earns about 10 billion USD per year now.
(Figures all taken from world bank)
etc etc. and they earn them across a diverse range of technology compared to China....and with noticeably smaller population sizes.
In US, UK, Germany, France, Canada.... some relative large portion of this comes from gas turbine field and propulsion in general.
There are larger multiplier effects in economy from these too (longer topic to get into). But these are what are vetted by cross border market reality in the end (compared to say govt GDP estimates and so on with whatever inflation inside it).
But what I mean to say in end is its clear where leg up in technological ecosystem resides in the end still and how TR leveraged and leverages this (by EU trade+investment deals/access, NATO/western ecosystem, the higher technical education cooperation over longer timeframe of years I mentioned before)....that also has its clear effect in say an apex niche area like gas turbines and jet engines. It is very different to countries that were never part of NATO or in close proximity to large rich EU market basically...and have (especially relative to their population size and potential) opened up to free market economics fairly recently and still somewhat nominally still.