Join Date: Nov 2018
Location: Istanbul, Turkey
Programs: TK Elite Plus,BAEC GGL,ITA Executive, AFKL Gold,QR Gold,HH Diamond,Bonvoy Gold,ALL Gold
Posts: 14,186
TK is known for last minute equipment changes and since your are planning to fly in May, I would not rely on the equipment type listed currently on sale.
I wish you good luck but I had an equipment change of an ex-SU A350-900 to an A321neo last minute on ESB-IST despite booking the ticket 3 days ago my travel date.