New 'Saturn' gas-turbine corporation chief Iliya Fyodorov says 117C engine, which is installed on the last 'Sukhoi's serial Su-35, is able to achieve supersonic speed without use of afterburner. It was published yesterday in its interview to local 'RyniskOnline' site, and reproduced by other Russian internet-sites too.
As about Al-55 engine contract with India, which is assumed licension production and technology transfer, he said it's executed well. Some tech problems are still remained however, but in no doubts they will be solved. Now they work on engine's lifetime expectance improving.
My pics of AL-55 on MAKS-2009: