The Russian aircraft manufacturer Sukhoi has declared a flight test milestone for the T-50, before handing over the fifth-generation fighter to the Russian government for additional testing.

Sukhoi completed more than 700 flight tests, which confirmed aircraft requirements set by the Russian ministry of defense, United Aircraft Company said in a July 7 post on Facebook. The company has submitted the T-50 prototypes of the prospective aviation complex front-line aviation (PAK FA) programme for state joint tests, UAC states.

Sukhoi completed first flight of the T-50 29 January 2010 in Komsomolsk-on-Amur, the home of Russia's KNAAZ aircraft manufacturing complex.

With stealthy features and advanced electronics, the supersonic fighter was designed to rival the US Lockheed Martin F-22 fifth-generation fighter. Russia is on track to procure 55 T-50s through 2020, depending on the initial aircraft’s performance, FlightGlobal previously reported.