There seems to be a huge uncertainty in terms of Engine Supply from Ukraine to Turkey in order to be used in UAVs due to the ongoing war.
I came by a Flight by accident which could shed some light.
09 Apr 2022
There seems to be a Antonov-12BK (20 Ton Payload) which has taken off from Uzhhorod in Ukraine.
View attachment 42631
This plane is operated by Motor-Sich Airlines
The Antonov-12 has landed in Istanbul Grande Airport and not Corlu Airport.
After that it flew to Burgas in Bulgaria and hasn't moved since then
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15.04.2022
There is another Anotonov-12 from Istanbul Grande which flew to Greece
Which seems interesting because there is no flight history from where it flew to Istanbul.
Perhaps it had its Transponder turned off.
View attachment 42634
Another Detail:
The Antonov-12 apparently turns it Transponder off before it reaches Ukrainian Airspace, above Slovakia.
The Airport is right at the border.
View attachment 42635
View attachment 42636
So what I am suggesting:
Zaporizhzhia Motor Sich Plant > Truck to Uzhhorod Airport > Antonov-12 to Istanbul
View attachment 42637