Flight tests of Russian newest PAK FA (T-50) fighter aircraft with a standard engine will start in the near future, General Designer of the United Aircraft Corporation (UAC) Sergei Korotkov said Wednesday. Sputniknews reported.

So far the prototypes of the aircraft have been equipped with the so-called Izdeliye 117 — an engine of the "first stage," which has already been put into production, while the engine of the "second stage" is being developed.

"Testing of T-50 aircraft with the next-generation engine, which was initially created for this aircraft, will start in the near future," Korotkov said.

Russian Sukhoi T-50 (PAK FA) is the fifth-generation stealth fighter. It is a single-seat, twin-engine multirole jet fighter designed for air superiority and attack roles. The first flight of the aircraft took place in 2010.