This is stated in the message of the Russian defense ministry.

The Turkish Defense Ministry said that the seventh aircraft with C-400 elements had landed at the Murted airbase on July 14.

S-400 Uzun Menzilli Bölge Hava ve Füze Savunma Sistem malzemelerinin sevkiyatı planlandığı şekilde devam ediyor. Bu kapsamda yedinci uçak Mürted Hava Meydanı'na indi.

- TC Millî Savunma Bakanlığı (@tcsavunma) July 14, 2019

Deliveries of Russian S-400 anti-aircraft missile systems to Turkey began on Friday, July 12th.

Earlier, the chairman of the Federation Council’s information policy commission, Alexei Pushkov, spoke about possible US sanctions against Turkey because of S-400.

Expert Edward Lozansky commented on the NSNS likelihood of imposing sanctions against third countries because of the C-400.